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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
- 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
- Flu in the air: Germs tiny enough to pass through surgical masks may cause half of all cases
What lies within
View larger image | Although scientists are still debating the sun's precise composition, one new study suggests that hydrogen makes up just over 71 percent, helium 27 percent and metals 1.43 percent. Of the metals, oxygen is by far the most abundant, followed by carbon, iron and neon.
Credit: Source: M. Asplund
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By Leila Schneps and Coralie Colmez
Review by Janet Raloff
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