Chris Hadfield says Mars missions pose psychological challenges

Chris Hadfield says the psychological ramifications of being so far from Earth will play a big part in missions to Mars. Some of Canada’s current and former astronauts spoke at an event at the University of Ottawa on Friday.

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How do cigarettes affect the body? – TED Ed by Krishna Sudhir

Cigarettes aren’t good for us. That’s hardly news — we’ve known about the dangers of smoking for decades. But how exactly do cigarettes harm us, and can our bodies recover if we stop? Krishna Sudhir details what happens when we smoke — and when we quit. Lesson by Krishna Sudhir, directed by TED-Ed. Continue reading