but only rarely is a new type of meteorite discovered. Last week in Science, Brown et al. described what might be such an event with the orbit, fall and recovery of numerous fragments of a meteorite in the Canadian Yukon. Named after the frozen lake on which it fell, the Tagish Lake meteorite is a chondrite, which means it is a stony aggregate of matter from the early Solar System. It is descri...

The distribution and enantiomeric composition of the 5-carbon (C(5)) amino acids found in CI-, CM-, and CR-type carbonaceous meteorites were investigated by using liquid chromatography fluorescence detection/TOF-MS coupled with o-phthaldialdehyde/N-acetyl-L-cysteine derivatization. A large L-enantiomeric excess (ee) of the alpha-methyl amino acid isovaline was found in the CM meteorite Murchiso...