Historians and divers are trying to retrieve prehistoric clues from beneath the waves—but they have to act fast.

The Corriental reservoir was not contaminated at all. (1) Other ancient civilizations had their own water filtration systems ...

The signs of wave ripples in the sandy shores of ancient lake beds, created as wind pushed water back and forth have been found on Mars providing evidence that there were open bodies of water, not ...

Now, NASA’s Curiosity rover has identified two sets of ancient wave ripples on Mars, suggesting the presence of standing bodies of liquid water billions of years ago. Curiosity discovered the ...

Mysterious mounds on Mars were formed by ancient water, says a British study. These mounds are all that is left of a landscape, roughly the size of the UK, that has been almost entirely eroded away.

Hypothetical scheme of the ancient water purification system at Tikal ... serves to filter out larger and smaller contaminants as well as bacteria and other potential disease carriers.