The organic molecules could come from life or from ordinary chemistry — only samples returned to Earth can settle it.

Researchers have looked at how particular microbes from Earth would fare in conditions like those of Mars, the moon, and the ...

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth.

An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

There are "vast hidden magma systems" inside of Mars, scientists say – and it could have major implications for the search ...

New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

NASA’s Perseverance rover has uncovered what may be the strongest evidence yet of ancient life on Mars. Inside a ...

It may seem like we are on the verge of discovering alien life. In 2025, a press release stated that we have the “strongest hints yet” of extraterrestrial life on the exoplanet K2-18b. And when ...

When a scientific controversy or breakthrough dominates headlines, press officers and journalists often quote a handful of ...

A large neutral response can indicate several things. Scientists may judge the evidence genuinely inconclusive. They may hold an intermediate level of confidence. Or they may regard a claim as too ...