Ride's educational company supplied the cameras on the mission that allowed students to take their own pictures of craters and other geological features.

NPR: NASA Moon Craft Spots Ebb And Flow Crash Sites

Scientists have previously established the existence of water on Mars in the form of ice at the poles and water vapor, and pointed to geological features that appear to have been carved by water ages ago.

CNN: Life on Mars?

"I firmly believe that should future generations of geologists come back, they will identify these features as pervasive in the geological sense, " says Professor Wolfe.

BBC: Leaving our mark: Fossils of the future

Set in the Apennine mountains, the Geopark offers rich geological diversity and outstanding sites of mountainous landscapes, cave formations and coastal features.

UNESCO: NATURAL SCIENCES

"It can be very difficult to predict collapse because there is very little surface evidence of the features, " says Dr Vanessa Banks, an expert in shallow geohazards and risk at the British Geological Survey.

BBC: Who, What, Why: How are sinkholes formed?