The hydrogen cloud is a remnant of the universe's early formation, NASA said in a news release.

Researchers have reported what they believe is the first documented death from a meat allergy that can be triggered by tick bites. A 47-year-old New Jersey man died last year from alpha-gal syndrome, which in 2011 was first linked to bites from the Lone Star tick. More than 100,000 people in the U.S. have become allergic to red meat since 2010 because of the syndrome, according to one estimate.

New simulations suggest Saturn's rings formed from a shattered moon called Chrysalis, offering clues to the planet's tilt and surprisingly young rings.