On Jan. 15, 2025, the Gaia spacecraft took its last image. Then the craft ran a final round of engineering tests, fired its ...

Xenobots made from frog cells show surprising autonomy, raising questions about a possible third state of life beyond life ...

March 25: “Hurrah, and vote for suffrage! Don’t keep them in doubt.” — Febb Burn, a 47-year-old widower, in a letter to her ...