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Astronauts can suffer sleeping problems in space just as on Earth. Stress, heavy workloads, anxiety, background noise, light and air quality can all upset their body clocks. Minimizing sleep disturbances for astronauts is just one of the goals of the European Astronaut Centre's medical team.

Newt Gingrich was a little off-message during CNN's climate change debate Monday night. He was supposed to be pointing to the record-breaking cold temperatures as evidence that global warming is a hoax, like his fellow climate deniers.

But in lieu of wasting time denying the rise of global temperatures, the former House speaker and self-proclaimed "amateur paleontologist" instead chose a different tack: suggesting that it's arrogant of humans to act like we can or should control Earth's thermostat.