Mars' Inca City formation (left) is home to Martian ‘spiders’ every spring (right). 31,228 people played the daily Crossword recently. Can you solve it faster than others?31,228 people played ...

Most of the spots can be seen near Mars' mysterious Inca City, which was first discovered by NASA's Mariner 9 probe in 1972.

The European Space Agency and NASA just served up a reminder that Mars is not the static, frozen husk many picture. Each ...

From the iconic "spiders on Mars" and a giant dog-shaped blob to an underground ocean and other newly discovered water deposits, here are our 10 favorite things found on Mars this year.

Dubbed the "Inca City" for its resemblance to actual ruins discovered in South America, the bizarre rock formation may be made of elevated sand dunes that turned to stone over time, according to ESA.

Recently released satellite images show creepy-crawly formations scattered across Mars’ surface. The spider-like markings can be seen on the outskirts of Mars’ Inca City near the planet's ...

Recently released satellite images show creepy-crawly formations scattered across Mars’ surface. The spider-like markings can be seen on the outskirts of Mars’ Inca City near the planet's ...

Defrosting the Crests of Inca City, LAT: -81.5° LONG: 296.3° “The nature of this polygonal network, unique on Mars, remains poorly understood, but seems to be linked to volcanic dykes covered ...

Dubbed the "Inca City" for its resemblance to actual ruins discovered in South America, the bizarre rock formation may be made of elevated sand dunes that turned to stone over time, according to ESA.