Questions tagged [astrobiology]

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10
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1answer
115 views

What are the most similar Earth analogues to Mars' seasonally recurring slope linea?

Recurring Slope Lineae (RSL) on Mars are suggested to be water that seasonally melts from underground ice and sublimates through the sand and dust to darken the surface. Slowly flowing downhill to ...
4
votes
2answers
133 views

Could evidence of a signal from an exocivilization be found in the geologic record?

We know that the current SETI efforts have not found evidence for the existence of intelligent exo-civilizations (XCIV). There also has not been any evidence found of ancient non-human civilizations ...
8
votes
4answers
444 views

Do “water-worlds” not have plate tectonics?

Water-worlds are becoming increasingly important in the exoplanet/astrobiology community. If plate tectonics create land masses, then can we say that a water-world (a planet with a global ocean and no ...
10
votes
1answer
166 views

How would a Mars rover identify a microbialite fossil?

I recently read of a company in Canada using robotic technology to study freshwater microbialites. Their claim is that greater understanding of terrestrial microbialites could help in the search for ...
14
votes
1answer
178 views

What kinds of remote sensing required to observe methanogenic life on Titan?

Inspired by Chris McKay's Possibilities for methanogenic life in liquid methane on the surface of Titan. In the paper, the PI's found that the consumed acetylene, ethane, and other organic solids ...
12
votes
2answers
255 views

What are the ramifications to life on Earth when the Earth's magnetic poles switch?

This question is related to this question about the cause of the Earth's magnetic field switching polarity. My question is: How does this switch in the polarity of the magnetic field affect life on ...