https://www.ted.com/talks/nathalie_cabrol_how_mars_might_hold_the_secret_to_the_origin_of_life
microbe - a minute life form; a microorganism, especially a bacterium that causes disease.
be on the brink of sth - to be in a situation where something (usually bad) is going to happen very soon
brink - the verge of an event or state
subsurface - of, relating to, or situated in an area beneath a surface, especially the surface of the earth or of a body of water.
fossil - A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embeddedand preserved in the earth's crust.
ejecta - matter thrown out of a crater by an erupting volcano or during a meteorite impact
translucence - the quality of allowing light to pass diffusely
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