Curiosity Rover Collects First Martian Bedrock Sample 51
littlesparkvt writes "NASA's Curiosity rover has, for the first time, used a drill carried at the end of its robotic arm to bore into a flat, veiny rock on Mars and collect a sample from its interior. This is the first time any robot has drilled into a rock to collect a sample on Mars."
Was there an article? (Score:5, Informative)
Article (Score:5, Informative)
Comment removed (Score:4, Informative)
Re:Erosion (Score:5, Informative)
Re:Erosion (Score:4, Informative)
Re:Erosion (Score:4, Informative)
The stuff they're looking at is rock that's (very) slowly being further exposed through erosion by the wind - the rocks formed early in the history of Mars, then newer, upper layers have eroded away, exposing this particularly old stuff dating from around the time life began on Earth. If Mars had similar conditions, then it's a good place to look for remnants of organic molecules...
The aim of the drill is to get to rock that's not been significantly irradiated by cosmic rays. From this paper on The Sample Analysis at Mars Investigation and Instrument Suite [springer.com]:
Re:Erosion (Score:4, Informative)
However, the surface is covered in cruft, baked in the sun, exposed to the atmosphere. Note the colour difference between the drill-hole and the rest of the surface.
By drilling down even a little, you are ensuring that you really are seeing raw bedrock. A pure sample, which you can compare with the surface of the same rock, subtract one from the other and be left with just the cruft. Now you can check whether you have been correctly... errr... correcting for cruft in your samples of rocks which are too far out of Curiosities path to reach with anything other than the laser-and-spectrograph.