News reports claim that a Japanese patient was reinfected with Covid-19. But there are other possibilities, like a bad test or a flare-up of the original disease.
Despite hopes that ride hailing would ease traffic and reduce carbon emissions, a new study finds that it’s actually driving them upward.
One of NASA’s proposed missions would send a spacecraft to Venus on a suicide mission in order to study its atmosphere.
Cosmologists want to know how fast the universe is growing, but their data doesn’t match predictions. Wendy Freedman thinks red giant stars can help.
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The patient was admitted to UC Davis Medical Center on February 19 but not diagnosed until the 23rd—raising concerns about testing capabilities and health care workers’ exposure to the disease.
A new array of sats will detect nearly every bolt of lightning in the Western Hemisphere, powering an early warning system for climate-change-fueled superstorms.
The archive includes hi-res images of Muhammad Ali’s boxing gear, 15th-century manuscripts, and data that could help surface untold stories of women in science.
Bathe an amphibian in blue light and it glows a brilliant green. But what does this all mean?
Last week, the Department of Energy gave a commercial company the green light to test fuel made from spent uranium.