The largest piece of Mars ever to fall to Earth is being displayed for the first time. The hefty chunk of Mars weighs 32 pounds (14.5 kilograms) and measures 10 inches (25 centimeters) across at its widest point. It was unveiled Wednesday (Sept. 1) at the Maine Mineral and Gem...
The world's oldest meteor impact crater is not a crater at all, say scientists of a new study suggesting natural forces put the giant indent into Earth's surface. But the jury is still out. The wannabe crater, known locally as the Maniitsoq structure, is located 34 miles (55 kilometers) southeast...