Machine learning is quietly rewriting the rules of the cosmic hunt for company. Instead of waiting to recognize familiar ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

For decades, the search for life beyond Earth has focused on distant exoplanets and the rusty plains of Mars. Now, a small ...

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...