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That the Tharsis region on Mars has so few craters
Combustion
A chemical reaction that occurs when a substance reacts with oxygen to release energy in the form of heat and light, often resulting in fire.
Endangered Species
Species that faces extinction in all or a part of its range.
Threatened Species
Species likely to become endangered in the near future.
Endemic Species
Refers to species that are native to and found only within a specific geographical area.
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