Global temperatures were the hottest on record in 2024; it was the first year where the average temperature topped 1.5 degrees Celsius above preindustrial times.

Theresa Betancourt has studied Sierra Leone’s former child soldiers. Her new book Shadows into Light tells their stories.

People who recovered from PTSD changed the way their brains handle intrusive thoughts, a study of survivors of the 2015 Paris terrorist attacks shows.

About 40,000 years ago, giant kangaroos vanished Down Under. Dental analyses suggest a varied diet, meaning climate change was not the main cause.

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In some parts of California, fire season is now year-round due to rising heat and little rain. High winds and dry conditions are fueling L.A.’s infernos.

Subatomic particles called muons could measure pressure changes in supercell thunderstorms and the twisters they kick up.

Nearly 200 new gecko species found in living in karst landscapes reveal the rugged regions as dynamic areas of speciation.

A new tally finds dozens of species giving food a second go-round, from babies boosting their microbiomes to adults seeking easier-to-access nutrition.

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A new U.S. Surgeon General's report describes the link between drinking alcohol and developing cancer. Many Americans aren’t aware of the risk.

H5N1 has infected 66 people in the United States since early 2024, mostly causing mild illness. A Louisiana man was the first to get severely sick.