Jezero Crater on Mars was once home to a lake, delta and rivers. See an animation of what it could have looked like when water poured into the crater billions of years ago and present day. Credit: ...

Sometimes scientists must dig and work and sweat to make scientific discoveries. And sometimes a robot rolls over a rock that turns out to be a revelation.

The ripples suggest that the lake was free of ice at one point.

There are no RSL in this photo because it was taken during winter. Though RSL are linked to flowing water on Mars, scientists aren't sure where this water is coming from or how much of it exists.

Water once existed in abundance of at the surface of Mars. How much of that water has been stored in the planet's crust is still unclear, according to a new analysis.

Step aside, Santa Monica. It seems that Mars once had beaches that would give the Californian coast a run for its money.

Beyond that the space agency provided little information. So what is the "Mars mystery" NASA has solved? Flowing water on Mars. This is indeed a major discovery. Where there's water, there may be ...

“We tend to think about Mars as just a static snapshot of a planet, but it was evolving,” Cardenas said. “Rivers were flowing, sediment was moving, and land was being built and erode ...

For life to exist on Mars, there must be liquid water. There is plenty of water on Mars, but most of it is frozen in the polar ice caps and buried underground. Despite the chilly temperatures ...

Rovers exploring Mars study many aspects of the planet ... Deltas are triangular regions often found where rivers flow into larger bodies of water, depositing large amounts of sediment.