NASA Excited About Mars

The Mars rover Opportunity is making NASA scientists very happy. After a three-year journey, it's finally looking at the first rocks inside the Endeavor crater, The New York Times reports. As expected, the rocks are unlike anything the scientists have seen yet on Mars. Scientists say the rocks are full of zinc and bromine, elements that, at least for rocks on Earth, suggest they were formed by heat and water. The rocks in the crater are older, exposed by an impact long ago. The findings could support the theory that Mars once held liquid water. The rover could spend the next few years exploring the crater.