posted on Aug, 17 2014 @ 03:45 AM
Watch out for tumbling boulders on Mars!
A track about one-third of a mile (500 meters) long on Mars shows where an irregularly shaped boulder careened downhill to its current upright
position, seen in a July 3, 2014, image from the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance
The shadow cast by the rock in mid-afternoon sunlight reveals it is about 20 feet (6 meters) tall. In the downward-looking image, the boulder is only
about 11.5 feet (3.5 meters) wide. It came to rest standing upright. The trail it left on the slope has a pattern that suggests the boulder couldn't
roll smoothly or straight due to its shape. Nasa doesn't yet know what dislodged the boulder, but recent speculation suggests it may have been due to
a meteor striking one of the larger craters.
Official article and images:
Here's a full-scale image crop I made from HiView
It's cool how you can see some surface detail on the boulder.
Here's a zoomed-in view of the boulder:
There is what looks like a small crater on its top. I have a crazy idea that the boulder rolled down the slope after being hit by a small
edit on 17-8-2014 by wildespace because: (no reason given)