Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

The upcoming Habitable Worlds Observatory should be able to spot the glint of water on habitable planets, and maybe more ...

Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets ...

An alien radio signal from K2-155 d? Are there any alien civilizations out there? For several decades, scientists have been searching for evidence that they exist. That effort is collectively known as ...

Some scientists believe the sheer number of stars, planets and potentially habitable environments in space makes ...

An alien weapon has been found on Mars, according to a top UFO researcher. RadarOnline.com can reveal an image taken by NASA's Curiosity rover shows a long, narrow formation protruding from rocky ...

This summer, exoplanet science — the study of planets orbiting stars beyond our sun — took a big step forwards. Reports of helium gas escaping from the atmosphere of LHS 1140b propelled this exoplanet ...

There is no chance in hell our species will be able to reach another Earth-like planet in the Universe in the foreseeable future, so the only way we can get a sense of the habitability of such places ...

NASA is keeping an eye on Yellowstone, but not for the reason you might think. While most people worry about the supervolcano ...

Observations from NASA's Webb telescope have revealed detailed chemical fingerprints from catastrophic, planet-shattering collisions in other solar systems.

NASA is ready to explore the cosmos in a whole new way, thanks to its next-generation Nancy Grace Roman Space Telescope. Scientists and engineers have spent some twenty years designing and building ...