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Much of China’s massive capital Beijing shut down on Tuesday after the government announced air pollution red alert. The first-time red alert forced the city to close its schools, factories and construction sites. The alert also restricted the number of vehicles on the city roads.

While declaring red alert in Beijing, the government told its residents to take precautions with their health. Despite extraordinary measures against air pollution, the city’s air grew worse and left over 20 million people in hazy environment.

A superflare detected on a binary star similar to the sun has led astronomers think that the star at the center of the solar system could produce an enormous solar flare that could be disastrous for earth.

The superflare was observed on KIC9655129 by NASA's Kepler space telescope. As per astronomers, the star’s superflare has same properties as the sun’s smaller solar flares have. It shows that our sun in capable of producing such enormous solar flare, they said. Normal solar flares that the sun produces have energy equal to 100 million megaton bombs, but a superflare is capable of releasing energy equivalent to 100 billion megaton bombs.

A new study on dinosaur fossils has suggested that the creatures may have evolved earlier than thought. Paleontologists re-examined some dinosaur fossils from Chañares Formation of Argentina and found that the remains were misdated before.

Claudia Marsicano, a paleontologist at the University of Buenos Aires, said reanalysis of the fossils hinted that the creatures evolved millions of years earlier than first thought. Chañares Formation, from where the fossils were unearthed, is an important site for paleontologists due to amount of fossils it holds. Experts believe the site can have fossils from early evolutionary dinsauromorphs to many other later dinosaur species.

A public health official on Monday said that almost 200 people who recently ate at a catered party at a downtown Seattle office building have been reported to be infected with norovirus.

Dr. Meagan Kay, a medical epidemiologist for the public health department, said in a statement that public health officials closed all the food-service locations inside the Russell Investments Center in downtown Seattle. A Starbucks location was also order to be closed.

According to the US Centers for Disease Control and Prevention (CDC), norovirus can spread by an infected person, contaminated food, water or infected surface.

Kay said in a statement that of 600 people who attended the party catered by California-based Bon Appetit Management Co on Tuesday, 200 reported that they were sick.

In a meta-analysis designed to compare the efficacy and safety of once-weekly glucagon-like peptide-1 receptor agonists (GLP-1RAs) for treating type 2 diabetes, no clear winner emerged.

According to a team of British researchers, Exenatide (Bydureon) and dulaglutide (Trulicity) performed better as compared to others in controlling glucose and reducing body weight.

The only difference between the two drugs was very small and in many cases the difference was legible, said researchers.

Lead investigator Francesco Zaccardi, MD, of the University of Leicester and colleagues said in a joint statement that several studies conducted in past have compared once-weekly and daily GLP-1RAz, but so far they have found no direct comparisons between once-weekly GLP-1RAs.

The first penis transplant is all set to take place in the United States. The surgeons from Johns Hopkins School of Medicine said the first recipient of the penis transplant will be a young soldier.

Dr. Damon Cooney, assistant professor of plastic and reconstructive surgery and co-clinical director of the penile transplant program at Johns Hopkins, said they want to expand the field into areas that are not easy to reconstruct using conventional methods.

“The more and more interactions we've had with the military, the more we came to find out that although people aren't talking about it much, genital injuries are a much bigger problem for a lot of people”, said Dr Cooney.