Age

The science section of the New York Times (free subscription required) covers a novel application of radiocarbon dating -- a Swedish group has measured in people's tissues leftover radioactive isotopes from the big 1960s nuclear tests to figure out how fast cells are rebuilt.

The sorry saga of the shuttle continues. It makes you yearn for the good old days of the Mir, when duct tape sufficed to keep the craft in working order. I hope that the astronauts return safely, and that we have enough sense to let the junkyard claim these flying deathtraps.