Martian environmental contrast. (IMAGE)

Science China Press

Martian environmental contrast.

Caption

Liquid water was abundant on Mars before ~3 billion years ago (left) but vanished as the planet transitioned into the cold, dry environment we see today (right). Art from https://i.ytimg.com/vi/pOcV7XbbfDs/maxresdefault.jpg.

Credit

Art from https://i.ytimg.com/vi/pOcV7XbbfDs/maxresdefault.jpg.

Usage Restrictions

No restrictions.

License

CC0

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