Endeavour astronauts wrap up third spacewalk

Two US astronauts wrapped up their third spacewalk outside the International Space Station on Wednesday after some doing maintenance work on the Russian side of the orbiting lab, NASA said.

NASA astronauts test new exercises on space walk

Two astronauts floated out of the International Space Station on Wednesday after trying out new exercises aimed at preventing decompression sickness while conserving oxygen, NASA said.

Astronauts to try spacewalk 'hokey pokey': NASA

US astronauts on Tuesday will try out a new set of exercises to prepare them for the change in pressure they encounter on their spacewalk outside the International Space Station, NASA said.

Report describes the physics of the 'bends'

As you go about your day-to-day activities, tiny bubbles of nitrogen come and go inside your tissues. This is not a problem unless you happen to experience large changes in ambient pressure, such as those encountered by scuba ...

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