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Space confuses immune systems

Can an astronaut survive a long-term spaceflight?

Why women let loose on vacation

Who knew that having sex on the beach — or other far-flung tourist destinations — could be so complicated?

Bardarbunga the new Eyjafjallajokul?

Thousands of small quakes rock Iceland amid concerns one of country's volcanoes may erupt.

Sea plankton living in space

It's not quite ET, but astronauts have discovered things growing outside the space station.

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