Andrew Childs writes "The 1999 Nobel Prizes in the sciences have been announced. The physics prize goes to Gerardus 't Hooft and Martinus Veltman "for elucidating the quantum structure of electroweak interactions in physics." The chemistry prize goes to Ahmed Zewail "for his studies of the transition states of chemical reactions using femtosecond spectroscopy." And the prize in physiology or medicine goes to Gunter Blobel "for the discovery that proteins have intrinsic signals that govern their transport and localization in the cell." "