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What did Mars look like 4 billion years ago?

The team at NASA’s Conceptual Image Lab has an idea of what Mars looked like 4 billion years ago based on the existing evidence:

Billions of years ago when the Red Planet was young, it appears to have had a thick atmosphere that was warm enough to support oceans of liquid water – a critical ingredient for life. The animation shows how the surface of Mars might have appeared during this ancient clement period, beginning with a flyover of a Martian lake. The artist’s concept is based on evidence that Mars was once very different. Rapidly moving clouds suggest the passage of time, and the shift from a warm and wet to a cold and dry climate is shown as the animation progresses. The lakes dry up, while the atmosphere gradually transitions from Earthlike blue skies to the dusty pink and tan hues seen on Mars today.

The animation was released in anticipation of November 18th’s Cape Canaveral launch of MAVEN, Mars Atmosphere and Volatile Evolution mission. MAVEN will explore the planet’s lost atmosphere.

Watch this next: In search of water on Mars – Seasonal dark streaks on the Red Planet. Also: flying over a topographically accurate landscapes of Mars, and more NASA.

via PopSci.

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