What is the current state of Mars's atmosphere compared to Earth's sea-level pressure?
Answer
Less than one percent of Earth’s sea-level pressure
The current atmospheric state of Mars is extremely thin. It registers at less than one percent of the pressure found at sea level on Earth. This scant atmosphere is predominantly composed of carbon dioxide. The low pressure inherent in this thin atmosphere is fundamentally incapable of supporting liquid water on the surface, regardless of brief equatorial temperature spikes, maintaining the planet in a permanently arid state.
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