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Transcript

Theory

There are 3 variations of the Panspermia Hypothesis

  • Lithopanspermia (interstellar panspermia) - impact-expelled rocks from a planet's surface serve as transfer vehicles for spreading biological material from one solar system to another.

  • Ballistic panspermia (interplanetary panspermia) - impact-expelled rocks from a planet's surface serve as transfer vehicles for spreading biological material from one planet to another within the same solar system

  • Directed panspermia - the intentional spreading of the seeds of life to other planets by an advanced extraterrestrial civilization, or the intentional spreading of the seeds of life from Earth to other planets by humans

Supporting Evidence (Cont.)

  • Chemicals can be passed from asteroid to asteroid through collisions, which ends up ending up on a planet and creates life.
  • The timeline of Earth (Meteor Showers) suggests that the creation of life did not originate from our planet

Supporting Evidence

When was it Proposed?

  • The Panspermia Theory was first proposed in the writings of the Greek philosopher Anaxagoras (500 BC – 428 BC).

  • It then appeared in the writings of French noblemen in 1743.

  • In 1973, a nobel prize winning scientist proposed the theory of directed panspermia. ( Professor Francis Crick & British chemist Leslie Orgel)

"I believe in the Panspermia Theory!"

Leading Theorists

  • Scientists found a meteorite from Mars that contained remains of terrestrial nanobacteria, which supports the theory because it suggests that life was created from debris from other planets or "seeds".
  • It is possible for "life" to stay inside of an asteroid, so it is possible for "seeds" to travel through space.
  • Scientists have proved that chemicals could become living matter and it could reproduce to become life.

Jöns Jacob Berzelius (1779–1848)

Lord Kelvin (William Thomson) (1824–1907)

Hermann von Helmholtz (1821–1894)

Bibliography

More Evidence!!!

What is the Panspermia Theory?

  • http://www.panspermia-theory.com/
  • https://helix.northwestern.edu/article/origin-life-panspermia-theory
  • http://futurehumanevolution.com/the-panspermia-theory
  • http://www.businessinsider.com/panspermia-theory-posits-life-on-earth-could-come-from-mars-2015-11
  • http://www.nytimes.com/2013/09/12/science/space/a-far-flung-possibility-for-the-origin-of-life.html?_r=0
  • https://blogs.scientificamerican.com/life-unbounded/the-panspermia-paradox/
  • Even if only the strongest organisms would survive, when they arrive on Earth, they will start to evolve and become what they are today.
  • Asteroids could hold certain chemicals that can produce RNA which is able to help start life on planets.
  • The presence of carbon-based matter in meteorites supports the possibility that life on our planet could have come from outer space.

Bibliography

  • http://bioteaching.com/the-origin-of-life-and-of-the-atmosphere/

Panspermia is actually a greek word that means "seeds everywhere".

  • The theory states that all planets came from "seeds" that are traveling through space from one location to another.

Refuting Evidence

  • Since the "seeds" travel all through space, it is very unlikely that multiple organisms would survive.
  • If this theory was possible, then there would be life on other planets that have no life on it right now.
  • If life came from other planets, then there should still be life, or evidence of some life, on other planets.

The Panspermia Theory

By: Parker Schroeder

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