PASADENA, Calif. Feb. 10 — NASA's Opportunity rover has embarked on a "scoot and shoot" on Mars, driving counterclockwise around the rocky inner perimeter of a crater while photographing it in detail.
Scientists likened Opportunity's landing to a hole-in-one in golf: The air bag-cushioned rover bounced and rolled across the martian surface right into a small crater.
<snip>
Microscopic images of the rock show its fine layers hold numerous spherical granules, "embedded in it like blueberries in a muffin," Cornell University astronomer Steve Squyres said.
The sulfur-rich rock, probably volcanic ash or compacted, windblown dust, sheds the relatively harder granules as the outcrop erodes, said Squyres, the mission's main scientist.
"This is wild-looking stuff," Squyres said.
http://abcnews.go.com/wire/US/ap20040210_327.html