Mass extinctions as reasons to colonize space and get pollution free energy from space

thumb|300px|left|Asteroid strikes get all the coverage, but Medea Hypothesis author Peter Ward (TED Talks) argues that most of Earth's mass extinctions were caused by lowly bacteria. The culprit, a poison called hydrogen sulfide, may have an interesting application in medicine thumb|300px|right|Bees are dying in droves. Why? Leading apiarist Dennis vanEngelsdorp (TED Talks) looks at the gentle, misunderstood creature's important place in nature and the mystery behind its alarming disappearance