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Carl Sagan with a model of the Viking Lander in Death Valley California. Viking 1 and 2 were the first spacecraft to search for present day life on Mars, indeed, the only spacecraft to ever search for life outside of Earth. But with new discoveries about the possibilities for liquid water both in microhabitats on Mars and the subsurface oceans of Europa and Enceladus, and the ethane / methane seas of Titan this is a top priority for future missions.

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Life on Mars:

Planetary protection:

Life elsewhere

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This encyclopedia is based on astrobiology articles imported from Wikipedia. You are welcome to join in and help edit it. We welcome those knowledgeable in astrobiology especially, and your expertise and knowledge will be respected here. The aim here is to have a small friendly wiki, where we work together, and know each other. Do introduce yourself, here New editors

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These wikis are also developed from Wikipedia pages originally:

For the background to why we set up new encyclopedias, instead of working on the pages in Wikipedia itself, see background to this encyclopedia. Also see my science blog post here:

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