Caltech scientists have found a fast and efficient way to add up large numbers of Feynman diagrams, the simple drawings ...

The chemical is bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, also called BTMPS, which is in a group of chemicals called hindered amine light stabilizers. BTMPS is usually added to plastics, ...

Buried for 209 million years, a tiny flying reptile and its ancient neighbors just emerged from Arizona’s Triassic past.