Cosmic Journeys: Footage of Mars

The video explores the history of water on Mars, using infrared astronomy to reveal that Mars once had a significant ocean covering 20% of its surface. This ocean was about a mile deep and existed for a longer period than previously thought, suggesting Mars was wet for over 1.5 billion years. These findings open up possibilities for Mars' habitability and the evolution of life.

For how long was Mars believed to have been wet, according to recent findings?

What implications does the presence of water on Mars have for the evolution of life on the planet?