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Are Are we we alonalone?e?

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eextraxtratterrestrial lifeerrestrial life• life other than that on Earth

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favorable favorable conditionsconditionsneeded forneeded forlife as welife as we know itknow it

liquid liquid waterwater

suitable suitable temp.temp.

range &range &atmosphereatmosphere

sunlightsunlightor otheror otherenergyenergy sourcesource

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Goldilocks conditionGoldilocks condition

•temp. not too hot- not too cold

• Earth = just right

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Extreme Conditions- bacteria in hot springs

show that range of conditions in which life can exist - much greater than scientists once thought

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Life on MarsLife on Mars Life on EuropaLife on EuropaViking missions-

tested air & soil for signs of life

moon of Jupiter

areas on Mars looked like stream beds w/

paths of water- possible evidence

may have had running water

Voyager & Galileo missions

possibly fossils in meteorite

covered by layer of ice-possibly liquid H20

under

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VIKING ORBITER VIEW OF MARS

surface of Mars looks like streambeds w/ crisscrossing paths of water – maybe Mars had flowing water??

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possible fossil bacteria in Mars meteorite

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Scientists have discussed sending a robotic probe to search for life in the ocean below Europa’s icy crust.

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So, is there life beyond Earth?

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2. Extraterrestrial Paragraph

•Name of extraterrestrial•Where it comes from•What it eats•How it lives in its environment

1. Make an extraterrestrial