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Contents
- Mystery Meteorite: The case for (and against) a rock from Mercury
- Hard Times for Theorists in a Post-Higgs World: The Large Hadron Collider’s big success leaves no clear avenue for new physics
- In the Eye of the Tiger: Global spread of Asian tiger mosquito could fuel outbreaks of tropical disease in temperate regions
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Contents
- Cool Jobs: Moved by life: Biologically inspired robots travel — naturally
- Infection time: Disease is more severe when it hits in the morning, at least in mice
- Explainer: Our bodies’ internal clocks: Biological clocks determine hunger, sleepiness and other daily rhythms
INTIMATE ENCOUNTER
View larger image | In mammals, millions of sperm race through the female reproductive tract vying to be the first to access the egg. But the sperm have to get through a protective membrane called the zona pellucida.
Source: K.G. Claw and W. Awanson/Ann. Rev. Genomics Hum. Genet. 2012
Credit: E. Feliciano
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