WASHINGTON — With a new surge of Covid-19 infections ripping through much of the United States, the Food and Drug Administration has accelerated its timetable to fully approve Pfizer-BioNTech’s coronavirus vaccine, aiming to complete the process by...

A federal judge temporarily blocked Texas state troopers from enforcing the governor’s order to stop anyone who isn’t in law enforcement from transporting migrants along the Texas border. The judge’s order, in effect until Aug. 13, also temporarily...

By 2100, almost the entire Emperor penguin population could die out due to rapidly melting ice, suggests research published Tuesday in the Global Change Biology. The study found that 98 percent of the colonies of Emperor penguin colonies could be gone...

The Perseids are building toward an Aug. 11 peak, but you can catch them blazing across the sky right now. Here's how.