There was nothing terribly remarkable about the Iridium 33 and Kosmos 2251 satellites—at least not at first. Iridium was a 1,500 lb. communications satellite the U.S. launched into space in 1997; ...

Visual recognition of objects is a key function of the primate brain. There is a progression in the complexity of the representation of the visual scene by single neurons. Neurons in early visual ...

Find out what's up in your night sky during May 2026 and how to see it in this Space.com stargazing guide. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...