Life
How your friends' friends can affect your mood
Features
This week's magazine
Table of contents
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Earth
Comet smashes triggered ancient famine
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Earth
Why mountains are bad for the ozone layer
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Life
Sniff of sickness makes mums prime babies for life
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Spiralling sperm find eggs in rough waters
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Life
Space experiment has a sting in the tail for newts
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Health
Beer marinade cuts steak cancer risk
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Technology
Implants for babies could help deaf learn to speak
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Space
Mystery stone circles may point to water on Mars
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Nearby galaxy clobbered by dark matter 'hit and run'
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Space
Mars rovers reach fifth anniversary
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Technology
Wikipedians are 'closed' and 'disagreeable'
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Technology
Nano-bubble protects anti-cancer treatment
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Technology
Gizmo: Touch skins
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Life
Cyborg cockroaches could power own electric 'brains'
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Technology
Nanobot lets DNA legs do the walking
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Health
Radical alternatives proposed for cannabis controls
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Health
'Strings' of drugs deliver only when needed
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Obama's science 'dream team' prepares for business
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Deep-sea fish uses mirror magic to reflect light
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