Readers share photos of gray bird species that live across America. Learn about the variety of gray colored birds you should know.

Federal officials are reporting the lowest numbers of gray whales counted since the 1970s. More than 20 have died in S.F. Bay this year.

This is “pretty common” in cod, haddock, and salmon, says John Hawdon, Ph.D ., professor of Microbiology, Immunology, and Tropical Medicine at the George Washington University School of Medicine & ...

Experts say not to touch hammerhead worms as they secrete potent, paralyzing tetrodotoxin, ... flattened body that ranges from 8-to-15 inches, and it can be found in shades of gray, brown, gold, ...

The gray whale population was large, at about 27,430 between 2015-2016. In the following years, a decline started from 2019-2023 to below 15,000 that was considered as unusual mortality event. It ...