In an appearance on Fox News, FBI Director Christopher Wray reiterates the agency's position about the origins of COVID and a potential lab leak. The assessment is not new, but it's far from universal. Carolyn Kaster/AP hide caption
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Tuesday
Security guards stand in front of the Huanan Seafood Wholesale Market in Wuhan, China, on Jan. 11, 2020, after the market had been closed following an outbreak of COVID-19 there. Two studies document samples of SARS-CoV-2 from stalls where live animals were sold. Noel Celis/AFP via Getty Images hide caption
Population geneticist Dr. Janina Jeff is the host and executive producer of "In Those Genes," a hip-hop inspired podcast that uses genetics to uncover the those lost identifies of African descended Americans through the lens of Black culture. Jas Thomas/Janina Jeff hide caption
Monday
IMPACTS mission researchers inside the research plane, monitoring weather data being collected by onboard instruments. Erica McNamee/NASA hide caption
Scientists are flying into snowstorms to explore winter weather mysteries
Ron Fodo, Ohio EPA Emergency Response, looks for signs of fish and also agitates the water in Leslie Run creek to check for chemicals that have settled at the bottom following a train derailment that is causing environmental concerns on February 20, 2023 in East Palestine, Ohio. Michael Swensen/Getty Images hide caption
How the EPA assesses health risks after the Ohio train derailment
Sunday
How to help young people limit screen time — and feel better about how they look
Saturday
Lucira Health, which developed the dual-purposed diagnostic test, said it can provide results in about 30 minutes. Lucira Health hide caption
Friday
Mariana Yazbek, Genebank manager, shows fava beans that are packed inside bags in the large freezer room where the seeds are stored to dry at the ICARDA research station in the village of Terbol, in the Bekaa valley, east of Lebanon, Wednesday, December 21, 2022. Dalia Khamissy for NPR hide caption
How ancient seeds in Lebanon could help us adapt to climate change
Thursday
A U.S. Air Force pilot looked down at the suspected Chinese surveillance balloon as it hovered over the Central Continental United States on Feb. 3. The pair was flying over Bellflower, Mo. Department of Defense hide caption
LOS ANGELES - JAN 8: Brent Spiner as Lt. Commander Data in the STAR TREK: THE NEXT GENERATION episode, "The Hunted." Season 3, ep 11. Original air date, 1/8/90. (Photo by CBS via Getty Images) CBS Photo Archive/CBS via Getty Images hide caption
What is life? For scientists, asking is easier than answering
Wednesday
This hole was made in a Bronze Age man's skull shortly before he died, archaeologists say, based on several clues. It's the result of a surgical procedure called a trephination. Kalisher et al., 2023/PLOS ONE hide caption
Clues to Bronze Age cranial surgery revealed in ancient bones
These images provided by NASA and the European Space Agency show six candidate massive galaxies, seen 500 million to 800 million years after the Big Bang. NASA via AP hide caption
A 6.4-magnitude quake hit the Hatay province in southern Turkey, in Antakya, on February 21 — two weeks after a 7.8-magnitude earthquake hit near Gaziantep, Turkey, in the early hours of February 6, followed by another 7.5-magnitude tremor shortly thereafter. The initial quakes caused widespread destruction in southern Turkey and northern Syria and has killed more than 44,000 people. Sameer Al-Doumy/AFP via Getty Images hide caption