aug 5, 2012 - Mars Rover Curiosity Successfully Lands
Description:
This is basically a Chemistry lab on wheels to discover whether Mars is capable of supporting any kind of life. It discovered that there was once a riverbed and a lakebed that contained the essential elemental ingredients for life and a type of chemical energy source.
https://www.learner.org/courses/chemistry/timeline/main/timeline.html
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CH 345 Timeline
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