Search for Life

The Pentagon's UFO office says there is no evidence for claims that any sightings represent extraterrestrial technology or that the government possesses crashed alien spacecraft.

The thicknesses of ice shells covering our solar system's ocean-bearing moons could provide hints about whether these mysterious bodies may harbor life.

Scientists asked the question: If Earth was an exoplanet, what would reveal it hosts life? The answer was used to verify the usefulness of a planned space mission dubbed "LIFE."

A newfound exoplanet system with six sub-Neptunes has piqued the interest of scientists who seek extraterrestrial life.

Does life exist elsewhere in the universe? If so, how do scientists search for and identify it? Finding life beyond Earth is extremely difficult, partly because other planets are so far away and partly because we are not sure what to look for.

Organic material on Saturn moon Titan's surface may have difficulty getting to the underground ocean. That's where it'd need to go for Titan to potentially support life.

Astronomers revitalize an old concept called the SETI Ellipsoid that incorporates supernovas in the search for extraterrestrial intelligence.

Tests suggest the European Extremely Large Telescope will be able to detect crucial biosignatures on other worlds.

NASA has mounted all nine science instruments on its highly anticipated Europa Clipper spacecraft, which will launch toward Jupiter's icy ocean moon this year.

Space.com caught up with Bill Diamond, President and CEO of the SETI Institute for an exclusive, mind-stretching close-encounter discussion regarding the search for extraterrestrial intelligence.