Mars orbiter captures mysterious hollows in the ice on surface of planet - but are they wrong shape for meteorite impacts?

Source: Daily Mail - UK

Holes in planet are 'wrong shape' for normal meteoriteLayer of pure ice seems to have been exposedHas ice 'boiled off' into space to cause weird shapes? The surface of Mars is dotted with craters - but when the HiRise camera abo ...
Full article at: Daily Mail - UK  More like this  1 day ago, 4:53am CDT

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Mystery Mars Formation May Be Ancient Volcanic Ash

Source: LiveScience.com

Medusae Fossae Formation (units outlined in red) on global geologic maps of Mars. Area shown covers 15 S to 15 N latitude, 135 to 235 E longitude. [Portions of geologic maps by Greeley and Guest (1987; Map ...
Full article at: LiveScience.com  More like this  2 days ago, 3:30pm CDT

Mars craters are sublime | Bad Astronomy

Source: Discover Magazine

Someday, Mars will stop surprising me. Today is not that day. The image below was taken by the HiRISE camera on the Mars Reconnaissance Orbiter, which has been taking devastatingly high-res pictures of the Red Planet for many y ...
Full article at: Discover Magazine  More like this  2 days ago, 9:01am CDT

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Did ancient Mars have a runaway greenhouse?

Source: PhysOrg.com

The idea of runaway warming is most commonly associated with Venus. Scientists think that planet's close proximity to the Sun heated its water, causing it to build up in its atmosphere as steam. Water is a greenhouse gas, trapping heat from ...
Full article at: PhysOrg.com  More like this  2 days ago, 7:47am CDT

NASA Mars Reconnaissance Orbiter HiRISE Images - May 16, 2012

Source: Space Ref

- A Youthful Crater in the Cydonia Colles Region http://hirise.lpl.arizona.edu/ESP_025716_2200 Just what makes a Martian crater youthful, in a geologic sense? Very old craters tend to have eroded rims and can have plenty of materia ...
Full article at: Space Ref  More like this  5 days ago, 1:31pm CDT