Here's what to know about peptides, what they can and can't do, and what's driving viral claims about possible health benefits online....

New York Yankees shortstop José Caballero became the first MLB player to use the Automated Ball-Strike System on Opening Day, losing his challenge of a Logan Webb sinker....

Amid the war in Iran and other international conflicts, the U.S. State Department continues to update its travel advisories for American citizens, revealing the latest list ahead of April travel....