Extraterrestrial life, or alien life (colloquially aliens), is life that originates from another world rather than on Earth. No extraterrestrial life has yet been scientifically or conclusively detected.

6 days ago · Aristotle believed the planets revolved around Earth and God could not have created other worlds. Today, scientists scour the surface of Mars for ‘biosignatures’ of microbial life.

Mar 20, 2026 · Extraterrestrial life-forms could have chemistry and characteristics that are quite foreign to humans, making them hard, if not impossible, for our tools to detect. So, are we alone in the...

May 24, 2025 · Discover interesting facts about where alien life forms are likely to exist, and what they look like.

Apr 14, 2026 · extraterrestrial life, life that may exist or may have existed in the universe outside of Earth. The search for extraterrestrial life encompasses many fundamental scientific questions.

Mar 9, 2026 · So far, the only life we know of is right here on our planet Earth. But we’re looking. The big question – Is there life beyond Earth? – comes with an ironic asterisk: we don't really have a …

Apr 15, 2026 · Alien life may hide in plain sight: Statistical patterns across exoplanets move beyond traditional biosignatures by Institute of Science Tokyo edited by Sadie Harley, reviewed by Robert Egan

Mar 25, 2026 · Astronomers have narrowed down the cosmic search for life, identifying fewer than 50 rocky planets among thousands of known exoplanets that may have the right conditions to support …

Feb 20, 2026 · Extraterrestrial Life coverage from Scientific American, featuring news and articles about advances in the field.

Mar 4, 2026 · When you imagine a lush planet full of life, one colour springs to mind immediately: green. But recent research suggests that, when we’re looking for alien life, we should be searching for other …