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.

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.

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

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

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

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

Deformed scales in hatchlings and biomarkers indicative of disease progression are two health impacts on turtles at PFAS-polluted sites in Australia.

Pluto and Charon’s meet-cute may have started with a kiss. New computer simulations of the dwarf planet and its largest moon suggest that the pair got together in a “kiss-and-capture” collision, where ...

AI is as good as clinicians at interpreting mammograms, a cancer study with nearly 500,000 participants in Germany suggests.

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.

A velvet ant bite like “hot oil from the deep fryer” delivers an array of peptides that inflicts pain on insects and mammals alike.

A variant of PCSK9, a gene involved in raising cholesterol, may spur metastasis. An approved antibody might stop it.