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Are We All Aliens? The Case for Panspermia

2/11/2014 Warm Up : One theory of the origin of life suggests life could have come to Earth from another planet. In a paragraph of at least five lines, tell what you think of this idea. Are We All Aliens? The Case for Panspermia. Are We All Aliens?. Life began on Earth ____________ years ago

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Are We All Aliens? The Case for Panspermia

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  1. 2/11/2014 Warm Up: One theory of the origin of life suggests life could have come to Earth from another planet.In a paragraph of at least five lines, tell what you think of this idea.

  2. Are We All Aliens?The Case for Panspermia

  3. Are We All Aliens? • Life began on Earth ____________ years ago • Define panspermia: • Two recent discoveries that support panspermia

  4. Agreement, but still caution 4. The prevailing theory on the rise of life on Earth states:

  5. Panspermia: Its own origins and evolution 5. Define ubiquitous: 6. How did Louis Pasture lead some to conclude life came from space?

  6. Support for parts of panspermia • Discovery made in Antarctica and its significance. • How long would it take for a space rock to make the trip from Mars to Earth?

  7. Earth as an exporter of life • How could a rock containing life be transferred between Earth and Mars? • Why is life more likely to have started on Mars and then traveled to Earth, than the other way around?

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