Astronomy Sep 23
Nicolas Dauphas, the Louis Block Professor in Geophysical Sciences, holds a chondrite meteorite that contains a puzzling mismatch in isotopic composition with Earth's crust. Scientists long believed that Earth formed from planetary objects similar to meteorites, but in a recent paper Dauphas and his colleagues explain how this mismatch could have come about.
Life Sciences Sep 23

It has long puzzled scientists why, after 3 billion years of nothing more complex than algae, complex animals suddenly started to appear on Earth.

Medicine Sep 23

New study indicates that the amount of gluten could be a more important clue than breast-feeding or the timing of the introduction of gluten for continued research into the causes of gluten intolerance.