How interesting would the discovery of alien microbes really be?

Recent evidence suggests microbial life may have been present on Mars, deep in that planet’s past. Some microbes have been exposed to space and survived, suggesting they are tough enough to endure incredibly harsh conditions...

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Where did all the water come from?

It was recently announced that the Rosetta space mission to the comet 67P/Churyumov-Gerasimenko found that water contained by the comet did not resemble water on Earth. This has added to evidence that comets probably did not deliver the oceans to our planet billions of years ago when it first formed. In that case, where did all the water come from..?

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Will we really find any signs of life beyond Earth?

Astrobiology is a science with little to no evidence. We know there is life here on Earth and, because Earth is in no way separate to the rest of the universe, we know that there is life in the universe. However, when it comes to looking for life beyond Earth we really have nothing much to go on...yet. By studying life on Earth we know increasingly more about where life could live...

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