Life

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* Saturn's moon Titan has plenty of evidence of organic(life) chemicals in its atmosphere.

* Life is only known to exist on Earth, but in 1986 NASA found what they thought might be fossils of microscopic living things in a rock from Mars.

* Life on Earth probably began 3.8 billion years ago.

* The first life forms were probably bacteria which lived in very hot water around underwater volcanoes.

* Most scientists says life's basic chemicals formed on Earth. The astronomer Fred Hoyle said they came from Space.

* Basic organic(life) chemicals such as amino acids have been detected in nebulae and meteorites (see meteors).

* Hug lightning flashes may have caused big organic molecules to form on the young Earth.

* Earth is right for life becaus of its gas atmosphere, surface water, and moderately warm temperatures.

* Mats is the only other planet that once had water on its surface-which is why scientists are looking for signs of life there.

* Jupiter's moon Europa probably has water below its surface which could spawn life.

!News Flash!

Microscopic organisms have been found in rock deep underground. Could similar organisms be living under the surface of Mars or Titan?

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