Four-legged robots that scramble up stairs, stride over rubble, and stream inspection data — no preorder, no lab coat required.

Miniature organs grown in the lab can organize themselves into complex shapes, which enables scientists to use them to study disease. The trouble is they never do it the same way twice, which has made ...

Over a period of nine days, users prompted Grok, the platform’s A.I. chatbot, to generate more than 1.8 million of these ...