(CNN) — World Athletics plans to introduce biological pre-clearance tests for track and field athletes before they can compete in the female category, the sport’s governing body announced Tuesday.

(CNN) — Five key division leaders at the US Centers for Disease Control and Prevention are leaving the public health agency as it braces for cuts that could affect as much as a third of its ...

Three deep field mosaics highlight hundreds of thousands of galaxies. Their shapes, brightness, and distributions offer a rich visual of the cosmic web. Each observation captures active galactic ...

A field of 11 3-year-old colts is set to face the starter for Saturday's $226,404 Fukuryu Stakes, an 1800-meter allowance contest at Nakayama Racecourse that serves as the last of four legs on the ...

night sky stock videos & royalty-free footage The camera flies through a star field against the backdrop of a Hubble like nebula ... A lonely island deep in the ocean. Rocky Beach. Sunrise over the ...