It's the peak of the fall migration season. This is when bird deaths from window collisions tend to spike, even though simple ...

A huge threat to migrating birds is colliding with a building. Now birding groups are banding together with government agencies and others to form one united front to tackle the problem.

A hidden swarm of "city killer" space rocks, known as co-orbital asteroids, is likely hiding around Venus and could pose an "invisible threat" to Earth over the coming millennia if the asteroids are ...

Just after dawn in Washington, D.C., Stephanie Haley is walking a familiar downtown route, scanning the sidewalk next to office buildings. There, huddled on the ground, is a motionless olive-green ...

We are in the height of the fall migration season. Hundreds of millions of birds are taking to the skies every evening. They fly south through the night, navigating with the help of the moon and the ...