Analysis of a space rock that landed on a frozen Michigan lake revealed a rich array of extraterrestrial organic compounds.

Tryptophan, the essential amino acid behind the Thanksgiving myth that eating turkey can make you sleepy, has been found to ...

It’s time to say hello to an old friend again. The first near-Earth asteroid ever discovered by humans, 433 Eros, will have a ...

Researchers say the latest discovery is particularly significant because tryptophan has never before been detected in ...