Could extremophile bacteria live anywhere else in the Solar System for at least a day?
Archaea are bacteria-like organisms that are capable of comfortably living in conditions that are extremely harsh. In fact, it is thought that the first life on Earth was some sort of archaea. We can't be sure since there are no fossil records of the first life.
Answer and Explanation:
Yes, bacteria or archaea can live in the solar system. In fact, in 2017 Russian astronauts swabbed the International Space Station (ISS) after a spacewalk and found bacteria that were not present before the launch. Russian scientists believe they are bacteria from outer space.
Since archaea survived on Earth for billions of years and withstood conditions that would easily kill other kinds of life (human, animal, plant) during the first billion years of the planet's life, we can say that there might be bacteria or archaea living outside our planet.
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from CLEP Natural Sciences: Study Guide & Test PrepChapter 9 / Lesson 15