The second phase of a high-definition deep-space active observation facility, China Fuyan, which is dubbed as the world's most far-reaching radar system, kicked off in Southwest China's Chongqing Municipality, the Global Times learned from the project lead Beijing Institute of Technology (BIT) on Tuesday. 

The second phase of the project, codenamed China Fuyan [faceted eye], will involve building 25 radars with a 30-meter aperture, so as to realize the detection and imaging of asteroids over 10 million kilometers away, which will provide strong support for China's near-Earth asteroid impact defense and planetary science research.

Construction of phase II, which will cover an area of over 300 mu (20 hectares), is expected to be completed by 2025. It will be a new research and development phase for the project, Long Teng, president of BIT and a member of the Chinese Academy of Engineering, said in a statement sent to the Global Times. 

China Fuyan will consist of distributed radars with more than 20 antennas, and each antenna will have a diameter of 25 to 30 meters. It is expected to become the world's most far-reaching radar system capable of carrying out high-definition observation of asteroids within 150 million kilometers. 

Long said that because the system has multiple antennas, like the faceted eyes of an insect, it was given the vivid name of China Fuyan.

Through high-resolution observation of asteroids, spacecraft, the moon, Earth-like planets and Jupiter Galileo satellites and other deep-space targets, China Fuyan will meet the need for the defense of near-Earth asteroids and situational awareness of space. It will provide key support for the study of habitability of the Earth, planet formation and other frontier scientific research.

The project has three stages of construction. The first stage was completed in December 2022 in Chongqing, consisting of four radars with a 16-meter aperture. It successfully captured the country's first ground-based three-dimensional radar image of lunar craters. 

After the completion of the second phase, the third phase of the project will expand the number of radar units to over 100, the Global Times learned. 

Unlike the Five-hundred-meter Aperture Spherical radio Telescope nicknamed Tianyan, which is designed to collect passive observations of radio signals from space, Fuyan will be actively shooting radio signals to celestial bodies in order to obtain new observations, experts noted.

This will be very helpful for China's lunar exploration, as it is capable of monitoring Chinese spacecraft' journey to the moon, they said.

China saw a fourfold surge of monkeypox cases in July compared to the previous month, but experts reached by the Global Times noted on Friday noted that China's home-developed vaccine will soon enter the clinical trial stage. 

They also said that although in most cases people heal on their own, newborns, children, pregnant women and people with immunodeficiency may have a higher risk of developing severe or even fatal conditions. 

Due to the mild symptoms caused by the monkeypox virus and the lack of large-scale global outbreaks, research into monkeypox vaccines has been relatively limited worldwide, the experts explained.

Meanwhile, as monkeypox and smallpox viruses have extensive serological cross-reactivity, the existing vaccines used for monkeypox prevention are all smallpox vaccines. 

Retrospective studies conducted by the World Health Organization have shown that smallpox vaccine administration has an efficacy of 85 percent in preventing monkeypox. Currently, there are three smallpox vaccines approved for monkeypox prevention in Europe, the US, and Japan, Su Jinfeng, a senior biomedical engineer, told the Global Times. 

Su called for accelerated development of new vaccines to protect those at greater risk and to prevent potential outbreaks. However, the expert admitted that the development of vaccines faces several challenges due to the limited number of monkeypox cases in the country and the dispersed population, which makes it difficult to conduct large-scale clinical trials to assess a vaccine's efficacy. 

"Currently, the US, Japan and European countries have considered this type of vaccine as a reserve drug. China should also accelerate the development of a new smallpox/monkeypox vaccine, not only to prevent the spread of monkeypox outbreaks but also to protect national security and public health from threats of smallpox virus being used as a bioweapon," a vaccine expert who preferred not to be named told the Global Times. 

Given the large genome and complex structure of the monkeypox virus, as well as limited understanding of protective antigens, the development of a protective antigen-based vaccine is challenging, the expert said. Therefore, a better strategy would be to use attenuated live vaccine technology, building upon the existing smallpox vaccine, to develop a safer vaccine in human cells.

As of April 2023, preclinical research on monkeypox vaccines has been conducted primarily by the US and China, said Su. Previous reports have indicated that a total of 14 clinical studies on monkeypox vaccines have been conducted globally.

Currently, three types of vaccine have been approved for the prevention of monkeypox, from Denmark, the US, and Japan. 

Research institutions in China have already started developing monkeypox vaccines, mainly focusing on replication-defective monkeypox attenuated live vaccines and monkeypox mRNA vaccines.

In July, the replication-deficient monkeypox vaccine developed by China National Pharmaceutical Group Corporation (Sinopharm) has passed the clinical trial application with the National Medical Products Administration, making it the earliest domestically developed monkeypox vaccine to enter the clinical research stage in China.

The Chinese mainland has reported 491 new monkeypox cases across 23 provincial-level regions, the country's Center for Disease Control and Prevention confirmed on Wednesday, increasing over fourfold compared to last month. 

According to epidemiological reviews, all cases are male with 96.3 percent of them identified as men who had sex with other men, and the risk of transmission through other contact methods is low.

The majority of cases exhibited typical clinical symptoms including fever, rash, and swollen lymph nodes, with no severe or fatal cases.

John Lee Ka-chiu, chief executive (CE) of the Hong Kong Special Administrative Region (HKSAR), listened to public concerns and suggestions from hundreds of people on Sunday during a district forum for the upcoming policy address in October, which is expected to include some new measures to attract talents and boost tourism. 

The two-session forum, held in Aldrich Bay Government Primary School and lasting two hours, was attended by about 120 people from all walks of life. During the forum, community members voiced their opinions on topics including land and housing, transport, innovation and technology, finance, culture and sports, education, youth, poverty alleviation, healthcare and social welfare, according to the website of the HKSAR government.

In the second session, participants were divided into four groups with the goal of engaging in extensive discussions with principal officials on themes that include boosting the economy and people's livelihoods. Lee interacted with those participating in each group in turn. 

Lee delivered his first policy address at the Legislative Council in October 2022, rolling out a series of measures in regard to attracting global talents, enhancing the city's competitiveness as an international financial hub, and further integrating into the country's overall development plan.

The CE said the public generally agreed to the governance policy in the 2022 Policy Address, and he hopes to listen to more public views and consolidate the objectives and implementation of different policies, so as to deepen and broaden policies as well as identify priorities.

The 2023 Policy Address is scheduled to be delivered on October 25, and the HKSAR government will conduct more than 30 consultation sessions to listen to views and suggestions of Legislative Council members, representatives of various sectors and members of the public.

Following the uncertainties in the global economy, Hong Kong society now expects the HKSAR government to formulate and implement policies to foster the local economy and business sustainability, some observers said. 

Lau Siu-kai, a member of the Chief Executive Policy Unit Expert Group, told the Global Times on Sunday that the HKSAR government should implement the important policies proposed in last year's policy address and deliver tangible results as soon as possible, so as to boost public confidence in the government and Hong Kong. "There's no need to force new policies every year," he said. 

"Many of the important policies proposed in last year's policy address have crossed the five-year term. The HKSAR government has been facing the financial pressure and grim external situation, so it should cherish and make good use of resources," Lau said. 

"We have too much experience in tolerating the poor standard of civil services. Several departments have not done their roles properly. Patients have to queue up for a year just for a five-minute medical consultation in public hospitals. Somehow the public housing resources are wrongly allocated to those with their assets hidden outside the jurisdiction," Chu Kar-kin, a Hong Kong-based veteran current affairs commentator who has been following the forum, told the Global Times on Sunday. 

Also, talents are attracted to the city, but jobs are not secure and careers are not promising. Taxpayers are paying for services or resources they cannot enjoy, Chu said. 

"Property prices and rents have rocketed for a decade and is in an adjustment stage. The government should allocate more resources to invest in our future such as education and welfare for the elderly. The government should also foster the cultivation of the technology and creative sector," he said.

During the forum, Lee said that "it is necessary to look at the different needs of the public in their daily lives and understand the living conditions of various community sectors when formulating policies," so as to respond proactively to the people's aspirations, local media The Standard reported. 

Neandertals hung out in what’s now northern Spain around 430,000 years ago, an analysis of ancient DNA suggests. That’s an earlier Neandertal presence in Europe, by at least 30,000 years, than many researchers had assumed.

Fragments of nuclear DNA from a tooth and partial leg bone discovered at Sima de los Huesos, a chamber deep inside a Spanish cave, resemble corresponding parts of a previously reassembled Neandertal genome, researchers say in a study published online March 14 in Nature.
Not much nuclear DNA survives in such ancient fossils, say paleogeneticist Matthias Meyer of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and his colleagues. Meyer’s group recovered DNA fragments covering a fraction of 1 percent of the newly recovered Neandertal tooth and leg genomes. Just enough DNA remained to enable comparisons with DNA of a Neandertal woman (SN: 1/25/14, p. 17) and a Denisovan woman (SN: 9/22/12, p. 5). Denisovans are considered close genetic cousins of Neandertals.

The early age for the new genetic finds challenges the idea that fossils from Sima de los Huesos, or pit of bones, come from a species called Homo heidelbergensis. Some researchers have suspected that by around 400,000 years ago, H. heidelbergensis gave rise to evolutionary precursors of both Neandertals and Homo sapiens.
An ancient genetic puzzle has also emerged at Sima de los Huesos. On one hand, nuclear DNA — which passes from both parents to their children — pegs the Spanish hominids as Neandertals. But mitochondrial DNA — typically inherited only from the mother — already extracted from one Sima de los Huesos fossil (SN: 12/28/13, p. 8) and described for a second fossil in the new study has more in common with Denisovans.

Denisovans lived in East Asia at least 44,000 years ago, but their evolutionary history is unknown.

If early Neandertals lived in northern Spain roughly 430,000 years ago, “we have to go back further in time to reach the common ancestor of Neandertals and Denisovans,” Meyer says.
The new genetic data from Sima de los Huesos now suggest that Denisovans split from Neandertals perhaps 450,000 years ago, says paleoanthropologist Chris Stringer of the Natural History Museum in London. Genetic and fossil evidence point to Neandertals and H. sapiens diverging from a common ancestor around 650,000 years ago, he proposes.

But it’s hard to say whether that common ancestor was H. heidelbergensis, Stringer adds. “Research must refocus on fossils from 400,000 to 800,000 years ago to determine which ones might lie on ancestral lineages of Neandertals, Denisovans and modern humans.”

Hominids throughout Eurasia during that time may have shared a mitochondrial DNA pattern observed in Sima de los Huesos Neandertals and Asian Denisovans, Meyer suggests. If that was the case, Neandertals acquired a new form of mitochondrial DNA by interbreeding with modern humans or their direct ancestors from Africa sometime between 430,000 and 100,000 years ago (SN: 3/19/16, p. 6).

Another possibility is that Neandertals traveled to Europe from Asia more than 430,000 years ago, carrying Denisovan mitochondrial DNA with them, says paleogeneticist Carles Lalueza-Fox of the Institute of Evolutionary Biology in Barcelona. Or hybrid descendants of early Neandertals and early Denisovans may have lived at Sima de los Huesos, carrying Denisovan mitochondrial DNA, he speculates.

“We really need more genetic data from Sima de los Huesos, and other sites of that age, to narrow down these scenarios,” Meyer says.

Corals are in hot water — and may soon lose their ability to handle the heat.

In Australia’s Great Barrier Reef, most past bouts of warming allowed many corals to adjust their physiology and avoid serious damage. But as waters warm even more, corals could run out of wiggle room, researchers report in the April 15 Science.

“One of the things that we have been striving for is trying to figure out the rate and limit of … physiological adjustments that corals have, how far you can push them,” says marine biologist Stephen Palumbi of Stanford University, who was not involved with the study. Corals may not be able to cope with much more ocean warming, Palumbi says. “I would take this paper as being the first real indication that we have half a degree at most.”
If water temperatures surge quickly, corals may bleach, losing the bacterial residents that provide them with nutrients and oxygen (and color). But if waters warm slightly — less than the roughly 2 degrees Celsius above average heat spike where bleaching begins — and then cool for a brief time before heating up to a greater extent, corals are better prepared to survive the heat. In the lab, corals exposed to this two-step heating process experienced less bleaching and less cell death than corals suffering a high initial heat wave, the researchers found.

“We liken it to the idea of training for a marathon,” says study coauthor Scott Heron, a physical oceanographer with the National Oceanic and Atmospheric Administration’s Coral Reef Watch in College Park, Md. “If they have a little bit of exposure, and then the recovery period after that … they’re better prepared for the race when it comes.”

From 1985 to 2011, around 75 percent of warming events on Great Barrier Reef sites occurred in this stepwise fashion, probably allowing corals to steel themselves and survive warmer waters. But with climate models predicting a 2-degree increase in sea temperatures by the end of the century, warming events could soon push corals past their bleaching point with no chance to prepare.

Computer simulations predicted that as waters grow warmer, reef heat waves will increase overall. But the fraction of such events that could condition corals to withstand bleaching will fall from 75 percent to 22 percent, the team reports. Most reefs that have experienced preconditioning in the past will start losing the ability to prepare when water temperatures increase by 0.5 degrees, the team predicts. Warming trends suggest that the added half degree should appear within 40 years. “If that protective mechanism does get lost going into the future, then what we’ve seen so far as being bad impacts could become worse,” Heron says.

For now, preparation may help some corals survive in warming seas, but reduced carbon emissions will also be required to sustain coral cover throughout the century, the team’s data suggest. Palumbi says these predictions are very important. “If we get a handle on emissions, there are substantial predicted differences in the way that coral populations live in the future,” he says. “We are still in a position to choose how the future of coral reefs works out.”

A baby titanosaur looked a lot like a grown-up — and it probably acted like one, too.

The (relatively) tiny fossils of a roughly 1- to 2-month-old dinosaur, Rapetosaurus krausei, discovered in what is now Madagascar, suggest that babies and adults had similar limb proportions, researchers report in the April 22 Science. That’s a sign that the babies were precocious, or didn’t require a whole lot of parental care, says study coauthor Kristi Curry Rogers, a vertebrate paleontologist at Macalester College in St. Paul, Minn. After hatching, she says, the tiny titanosaur may have been more self-reliant than babies of other dinosaur species.

A lack of very young titanosaur specimens has made it tough to understand the enormous dinosaurs’ growth patterns. Curry Rogers and colleagues estimate that when newly hatched, the baby weighed 3.4 kilograms — about the weight of a newborn human. But in just a few weeks, the dinosaur’s weight shot up to 40 kilograms, roughly as heavy as a 12-year-old boy.

During the growth spurt, all of the baby’s limbs grew at about the same rate, the team calculated with data from microscopic images and CT scans. Those data plus features of the bones’ tissue point toward a life that, though cut short by starvation, was both active and independent.

In the summer of 2013, an epidemic began sweeping through the intertidal zone off the west coast of North America. The victims were several species of sea star, including Pisaster ochraceus, a species that comes in orange and purple variants. (It’s also notable because it’s the starfish that provided ecology with the fundamental concept of a keystone species.) Affected individuals appeared to “melt,” losing grip with the rocks to which they were attached — and then losing their arms. This sea star wasting disease, as it is known, soon killed sea stars from Baja California to Alaska.

This wasn’t the first outbreak of sea star wasting disease. A 1978 outbreak in the Gulf of California, for instance, killed so many Heliaster kubinjiisun stars that the once ubiquitous species is now incredibly rare.

These past incidents, though, happened fast and within smaller regions, so scientists had struggled to figure out what had happened. With the latest outbreak happening over such a large — and well-studied — region and period of time, marine biologists have been able to gather more data on the disease than ever before. And they’re getting closer to figuring out just what happened in this latest incident.

One likely factor is the sea star-associated densovirus, which, in 2014, scientists reported finding in greater abundance in starfish with sea star wasting disease than in healthy sea stars. But the virus can’t be the only cause of the disease; it’s found in both healthy and sick sea stars, and it has been around since at least 1942, the earliest year it has been found in museum specimens. So there must be some other factor at play.
Earlier this year, scientists studying the outbreak in Washington state reported in the Proceedings of the Royal Society B thatwarm waters may increase disease progression and rates of death. Studies of California starfish came to a similar conclusion. But a new study, appearing May 4 in PLOS One , finds that may not be true for sea stars in Oregon. Bruce Menge and colleagues at Oregon State University took advantage of their long-term study of Oregon starfish to evaluate what happened to sea stars during the recent epidemic and found that wasting disease increased with cooler , not warmer, temperatures. “Given conflicting results on the role of temperature as a trigger of [sea star wasting disease], it seems most likely that multiple factors interacted in complex ways to cause the outbreak,” they conclude.
What those factors are, though, is still a mystery.

Also unclear is what long-term effects this outbreak will have on Pacific intertidal communities.

In the 1960s, Robert Paine of the University of Washington performed what is now considered a classic experiment. For years, he removed starfish from one area of rock in Makah Bay at the northwestern tip of Washington and left another bit of rock alone as a control. Without the starfish to prey on them, mussels were able to take over. The sea stars, Paine concluded, were a “keystone species” that kept the local food web in control.

If sea star wasting disease has similar effects on the Pacific intertidal food web, Menge and his colleagues write, “it would result in losses or large reductions of many species of macrophytes, anemones, limpets, chitons, sea urchins and other organisms from the low intertidal zone.”

What happens, the group says, may depend on how quickly the disease disappears from the region and how many young sea stars can grow up and start munching on mussels.

It’s hard to believe that it took reality television this long to get around to dealing with space, time and our place in the cosmos.

In PBS’ Genius by Stephen Hawking, the physicist sets out to prove that anyone can tackle humankind’s big questions for themselves. Each of the series’ six installments focuses on a different problem, such as the possibility of time travel or the likelihood that there is life elsewhere in the universe. With Hawking as a guide, three ordinary folks must solve a series of puzzles that guide them toward enlightenment about that episode’s theme. Rather than line up scientists to talk at viewers, the show invites us to follow each episode’s trio on a journey of discovery.
By putting the focus on nonexperts, Genius emphasizes that science is not a tome of facts handed down from above but a process driven by curiosity. After working through a demonstration of how time slows down near a black hole, one participant reflects: “It’s amazing to see it play out like this.”
The show is a fun approach to big ideas in science and philosophy, and the enthusiasm of the guests is infectious. Without knowing what was edited out, though, it’s difficult to say whether the show proves Hawking’s belief that anyone can tackle these heady questions. Each situation is carefully designed to lead the participants to specific conclusions, and there seems to be some off-camera prompting.

But the bigger message is a noble one: A simple and often surprising chain of reasoning can lead to powerful insights about the universe, and reading about the cosmos pales next to interacting with stand-ins for its grandeur. It’s one thing, for example, to hear that there are roughly 300 billion stars in the Milky Way. But to stand next to a mountain of sand where each grain represents one of those stars is quite another. “I never would have got it until I saw it,” says one of the guests, gesturing to the galaxy of sand grains. “This I get.”

In hunting down delicious fish, Flipper may have a secret weapon: snot.

Dolphins emit a series of quick, high-frequency sounds — probably by forcing air over tissues in the nasal passage — to find and track potential prey. “It’s kind of like making a raspberry,” says Aaron Thode of the Scripps Institution of Oceanography in San Diego. Thode and colleagues tweaked a human speech modeling technique to reproduce dolphin sounds and discern the intricacies of their unique style of sound production. He presented the results on May 24 in Salt Lake City at the annual meeting of the Acoustical Society of America.

Dolphin chirps have two parts: a thump and a ring. Their model worked on the assumption that lumps of tissue bumping together produce the thump, and those tissues pulling apart produce the ring. But to match the high frequencies of live bottlenose dolphins, the researchers had to make the surfaces of those tissues sticky. That suggests that mucus lining the nasal passage tissue is crucial to dolphin sonar.

The vocal model also successfully mimicked whistling noises used to communicate with other dolphins and faulty clicks that probably result from inadequate snot. Such techniques could be adapted to study sound production or echolocation in sperm whales and other dolphin relatives.
Researchers modified a human speech model developed in the 1970s to study dolphin echolocation. The animation above mimics the vibration of lumps of tissue (green) in the dolphin’s nasal passage (black) that are drenched in mucus. Snot-covered tissues (blue) stick together (red) and pull apart to create the click sound.

Jupiter’s turbulence is not just skin deep. The giant planet’s visible storms and blemishes have roots far below the clouds, researchers report in the June 3 Science. The new observations offer a preview of what NASA’s Juno spacecraft will see when it sidles up to Jupiter later this year.

A chain of rising plumes, each reaching nearly 100 kilometers into Jupiter, dredges up ammonia to form ice clouds. Between the plumes, dry air sinks back into the Jovian depths. And the famous Great Red Spot, a storm more than twice as wide as Earth that has churned for several hundred years, extends at least dozens of kilometers below the clouds as well.

Jupiter’s dynamic atmosphere provides a possible window into how the planet works inside. “One of the big questions is what is driving that change,” says Leigh Fletcher, a planetary scientist at the University of Leicester in England. “Why does it change so rapidly, and what are the environmental and climate-related factors that result from those changes?”

To address some of those questions, Imke de Pater, a planetary scientist at the University of California, Berkeley, and colleagues observed Jupiter with the Very Large Array radio observatory in New Mexico. Jupiter emits radio waves generated by heat left over from its formation about 4.6 billion years ago. Ammonia gas within Jupiter’s atmosphere intercepts certain radio frequencies. By mapping how and where those frequencies are absorbed, the researchers created a three-dimensional map of the ammonia that lurks beneath Jupiter’s clouds. Those plumes and downdrafts appear to be powered by a narrow wave of gas that wraps around much of the planet.

The depths of Jupiter’s atmospheric choppiness isn’t too surprising, says Scott Bolton, a planetary scientist at the Southwest Research Institute in San Antonio. “Almost everyone I know would have guessed that,” he says. But the observations do provide a teaser for what to expect from the Juno mission, led by Bolton. The spacecraft arrives at Jupiter on July 4 to begin a 20-month investigation of what’s going on beneath Jupiter’s clouds using tools similar to those used in this study.

The new observations confirm that Juno should work as planned, Bolton says.

By getting close to the planet — just 5,000 kilometers from the cloud tops — Juno will break through the fog of radio waves from Jupiter’s radiation belts that obscures observations made from Earth and limits what telescopes like the Very Large Array can see. But the spacecraft will see only a narrow swath of Jupiter’s bulk at a time. “That’s where ground-based work like the research de Pater has been doing is really essential,” Fletcher says. Observations such as these will let Juno scientists know what’s going on throughout the atmosphere so they can better understand what Jupiter is telling them.