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

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

In 1877, an Italian astronomer mapped faint lines on Mars and called them canali, meaning channels or grooves. But the word ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...

Discover six hard sci-fi films where science shapes story and emotion, like Europa Report and The Martian. Brainy, emotional, ...

At Drive-Thru Tree Park in Leggett, that’s exactly what you get to do with the famous Chandelier Tree. This giant coast redwood has a tunnel carved right through its base that’s big enough for your ...

Edward Leedskalnin was a tiny Latvian guy who got his heart broken and decided the appropriate reaction was to build an ...

An instrument on the Perseverance rover has identified large, complex carbon compounds alongside unusual patterns on the ...