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Astronauts aboard the International Space Station toast people back home with water recycled from their urine. A new system not only would turn pee into drinking water but also produce energy.

The expanding shell of gas shown here, called Abell 33, glows blue. It’s the remnant of a dying star. The bright star that appears to sit on the ring’s edge actually is nowhere near that shell of gas. 

The tuatara is the only surviving member of its order of reptiles. Global warming threatens the long-term survival of this New Zealand native. Shown here is a male tuatara with its crest erect — a typical display of aggression.

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