As wireless communication technologies spread, so the potential for viruses to exploit them grows. Biological models of virus transmission will assume new relevance for assessing the emerging threat.

Newly described fossils from Georgia in Eurasia and from Kenya shed more light on the earliest members of the genus Homo. These finds indicate that there was considerable variability in their size and shape.

Cell membranes contain channels that open to allow ions into cells. The structure of a sodium ion channel helps explain how it opens in response to protons, and settles a long-standing debate about its composition.