Every year, billions of birds undertake extraordinary migrations, crossing vast deserts and open seas with no place to stop, feed, or rest. A new international study published in iScience by a ...

It’s chilly at dawn in the desert, even though blazing heat will arrive before midday. To the east, stark outlines of cactus and thorny trees stand against the growing light. And on all sides, the air ...

Geese lift off a lake in front of a sun pillar at Squaw Creek National Wildlife Refuge near Mound City, Missouri. © Mike Hollingshead/Corbis As summer turns to fall ...

For 500 miles, I’d driven south, air conditioner blasting, radio on. When I arrived at the desert field station and stepped out onto the gravel, I was hit all at once by the heat, the quiet, and a ...

Migratory birds change how high they fly over deserts and seas. Wing shape, feather color, and heat all play a role in helping them survive.