State lawmakers also passed a separate measure prohibiting early classroom instruction on sexual and gender identity, a bill critics have dubbed "Don't Say Gay."

My 6-year-old has been exposed to SARS-CoV-2 at least four times and never tested positive. Many people fall into that category. Researchers have theories about why they've been able to ward it off.

A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

At least nine hurricanes are predicted by researchers at Colorado State University. Four of those are expected to be Category 3 or higher.