fragments of 120,000-year-old ostrich eggshells

Discarded ostrich shells provide timeline for our African ancestors

A black and white photo shows the profile of a pregnant person holding their belly.

COVID-19 infection raises risk of severe complications during pregnancy

 A photo of a forested hillside with smoke emerging from the trees, and a hazy, smoke-filled sky.

First-of-its-kind study links wildfire smoke to skin disease