Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		Health & MedicineHIV drugs didn’t work as a coronavirus treatment in a clinical trial
Antiviral HIV drugs “showed no benefit” when given to patients severely ill with COVID-19.
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		Health & MedicineHow parents and kids can stay safe and sane during the coronavirus pandemic
Infectious disease experts weigh in on playdates, playgrounds and other parenting questions.
By Laura Sanders and Sujata Gupta - 			
			
		Health & Medicine50 years ago, scientists were trying to get a grip on Lassa fever
In 1970, scientists were on the trail of a deadly new virus. Fifty years later, a vaccine is just now being tested in people.
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		Health & MedicinePeople who didn’t know they had COVID-19 drove its spread in China
A new study suggests that mild cases, in which people have no symptoms or don’t get sick enough to go to a doctor, are fueling the coronavirus pandemic.
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		ArchaeologyThis is one of the largest Ice Age structures made of mammoth bones
A massive ring of mammoth bones, built by hunter-gatherers during the Ice Age, offers a peek at life 25,000 years ago.
By Bruce Bower - 			
			
		Health & MedicineCoronavirus is most contagious before and during the first week of symptoms
As major efforts to contain the COVID-19 pandemic go into effect around the globe, researchers are figuring out just when patients are most contagious.
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		ArchaeologyAn ancient ball court sheds light on a game made famous by the Aztecs
A 3,400-year-old ball court in the southern mountains of Mexico suggests many societies contributed to the development of an ancient, well-known Mesoamerican ball game.
By Bruce Bower - 			
			
		Health & MedicineA trick from cancer cells helps rats accept transplanted limbs
Rats that received microparticles that release a chemical signal to recruit immune cells tolerated hind limb transplants for more than 200 days.
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		Health & MedicineSocial distancing, not travel bans, is crucial to limiting coronavirus’ spread
Everything from waving hello instead of shaking hands to cancelling large gatherings of people will help slow the spread of COVID-19.
By Jonathan Lambert and Tina Hesman Saey - 			
			
		Health & MedicineCruise ship outbreak helps pin down how deadly the new coronavirus is
Infections and deaths on the Diamond Princess suggest that, in the real world, 0.5 percent of COVID-19 infections in China end in death.
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		Health & MedicineWhat WHO calling the coronavirus outbreak a pandemic means
The world’s top global health organization is asking countries to double down on efforts to both contain the virus and mitigate its impact.
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		Health & MedicineRepurposed drugs may help scientists fight the new coronavirus
Work on similar viruses is giving researchers clues on how to begin developing drugs against the new disease.