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Thunder eggs may look calm and cool, but they're born in fire. They form in a volcanic rock called rhyolite. It's amazing what rhyolite gets up to. In this case, little nodules have formed within the ...

Among the ways to mark Easter Sunday is to celebrate with an Easter egg hunt. But a segment scheduled to air on “CBS Sunday Morning” Sunday, March 31 will take a slightly winking approach when it ...

People come to Oregon from all over the world to hunt for thundereggs, the seemingly unremarkable egg-shaped rocks that hide beautiful patterns of agate, opal, jasper and other gemstones. Oregon’s ...