The universe is incredibly old, incredibly large and teeming with potentially habitable planets. So why haven't we found any sign of aliens yet?
According to conspiracy theorists, the Black Knight satellite is an alien spacecraft orbiting Earth. Here's what's really going on.
Perseverance has identified carbon-containing organic chemicals in some of the rocks it's examined on the floor of Mars' Jezero Crater.
During the development of life on planet Earth over billions of years, iron deficiency may have stimulated evolution.
If intelligent aliens visit the Earth, it would be one of the most profound events in human history.
Humans have scanned and searched the heavens for signs of other advanced civilizations in the universe. And we've found nothing. Absolutely nothing. Maybe we shouldn't focus on intelligent life.
According to observations by Hubble and Kepler, the universe has only just begun to produce habitable worlds — what does this mean for the evolution of intelligent life?
Perseverance just snagged its fourth Red Planet sample, drilling another core from an intriguing rock that it sampled a little over a week ago.
Researchers warn that there are dozens of potential false biosignatures on Mars that could hinder the search for alien life.
A new space mission announced today (Nov. 16) will look for habitable planets in the Alpha Centauri system, our closest stellar neighbors.
The car-sized Perseverance rover drilled a core sample on Monday (Nov. 15), filling a titanium tube with Red Planet rock for the third time ever.
The four original Great Observatories, which launched between 1990 to 2003, provide a good example to follow.
The newly released astronomy and astrophysics decadal survey flags the discovery and study of habitable exoplanets and the exploration of black holes and neutron stars as two top research priorities.
REFERENCE Read on for a brief history of UFO sightings, potential explanations for them, and cultural attitudes toward the phenomenon.
Potential evidence of extraterrestrial radio signals from Proxima Centauri, the closest star to Earth, were likely just interference from human technology, researchers say.