rays
Galaxies Far, Far Away Send Us Highest-Energy Cosmic Rays
A new study hints that the most energetic particles ever seen come from far beyond the Milky Way. Learn more about your ad choices. Visit megaphone.fm/adchoices
Date of the Vikings' First Atlantic Crossing Revealed by Rays from Space
By dating the remnants of trees felled in Newfoundland, scientists have determined that the Norse people likely first set foot in the Americas in the year A.D. …
Birch Trees Droop at Night with No Rays in Sight
The branches of birch trees in Europe sagged by as much as four inches at night compared with daytime. Learn more about your ad choices. Visit megaphone.fm/adch…
UV Rays Strip Small Galaxies of Star Stuff
Researchers measured the intensity of the universe's ultraviolet background radiation, and say it may be strong enough to strip small galaxies of star-forming g…
