- ATMOSPHERIC SCIENCEArctic impact
Is the melting Arctic really bringing frigid winters to North America and Eurasia? Scientists struggle to piece together an atmospheric puzzle.
- MATERIALS SCIENCEValency and bonding on a larger scale
For over half a century, the biological roles of nucleic acids as catalytic enzymes, intracellular regulatory molecules, and the carriers of genetic information have been studied extensively.
- COMPUTERSA network approach to finding disease modules
Incomplete networks of protein-protein interactions help explain disease relationships, even in the absence of shared genes.
- BIOCHEMISTRYThe dark side of melanin exposed
Melanin, a pigment thought to protect against skin cancer, contributes to DNA damage occurring after ultraviolet exposure. [Also see Perspective by
Taylor]
- EVOLUTIONGetting bigger all the time
Diversification produced a 150-fold increase in the mean size of marine animals over the past 542 million years.
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