Life

No direct evidence (yet) that there is life
on other planets, moons, or in interstellar space.

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Life

• life is only known to exist on Earth.

 

• life on Earth probably began 3.8 billion years ago.

 

• first life form – probably bacteria that lived in very hot water around underwater volcanoes.

 

• most scientists believe that life’s basic chemicals formed on Earth – others think that they came from space, maybe on comets.

 

• basic organic chemicals – amino acids have been detached in nebulae and meteorites.
• huge lightening flashes may have caused big organic molecules to form on he earth when it was young.
• earth is suitable for life because of its gas atmosphere – surface water and moderately warm temperatures.

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Did you know?

Saturn’s satellite – Titan

• Saturn’s icy moon – Titan, has evidence of organic (life) chemicals in Titan’s atmosphere.  (More information: wikipedia)
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Jupiter’s satellite – Europa

• Jupiter’s moon – Europa, probably has water below its surface, which could spawn lie?  (More information: wikipedia)

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