The Aalborg Zoo in Denmark said it would take certain surplus pets to be "gently euthanized" and fed to its captive predators ...

Smoke from Canadian wildfires continues to bring poor air quality into the Northeast U.S. and the Upper Midwest. And the exposure to wildfire smoke remains a growing health problem.

The Trump administration cancelled about $500 million for research into mRNA vaccines. The move slows progress in using the ...