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Ancient mammals may have had an easier time moving across the Isthmus of Panama from north to south thanks to Mexico's climate.

Dietary arginine reduces tumor formation and viral load in mice by boosting key immune proteins.

A canopy call, a partial photo and DNA revealed a new primate species -- one that may already be at risk of extinction.

Women who received treatment for autoimmune diseases with CAR T cell therapy went on to have regular pregnancies and healthy babies.

Researchers documented behavioral similarities between 11 rehabilitated elephants and their wild counterparts.

Common dolphins in New Zealand are biologically older than their calendar ages. Trace metals and "forever chemicals" may be to blame.

A century of hints has suggested the famed red supergiant had a star pal but seeing it amid Betelgeuse's brightness has been hard -- until now.

Researchers scanned the ears of hundreds of marine mammals to deduce when pinnipeds evolved to hear well in both air and water.

Remains pulled from the La Brea Tar Pits revealed deformed vertebrae and rare tumors, possible signs of inbreeding among now-extinct saber-toothed cats.

The inferno that sent toxic smoke billowing toward the United States won't be the last. Officials are now battling both the wildfires and misinformation.