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,

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Presentation transcript:

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? 1.Life began on Earth ____________ years ago 2.Define panspermia: 3.Two recent discoveries that support panspermia

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

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

Support for parts of panspermia 7.Discovery made in Antarctica and its significance. 8.How long would it take for a space rock to make the trip from Mars to Earth?

Earth as an exporter of life 9.How could a rock containing life be transferred between Earth and Mars? 10. Why is life more likely to have started on Mars and then traveled to Earth, than the other way around?