Today in 1858, the founding of the city of Denver, Colorado. The state capitol building in Denver features a kind of stone known as Colorado Rose Onyx, and so far it's the only one.
October is National Stamp Collecting Month, and there are perhaps no more collectible stamps than the ones out of the small Asian country of Bhutan - like the "talking stamps" that were also vinyl records.
In northwestern Russia, on the Kola Peninsula, there's a metal cap covering a hole that scientists dug 7.5 miles down. Here's the story of the Kola Superdeep Borehole project.
Earth makes lots of seismic noise, but there's one that's mysterious - a slight pulse every 26 seconds called a microseism off the coast of West Africa. What causes it? We don't know!
Scientists have been trying for years to figure out why there's a gap in Earth's geologic record that's about a billion years long, known as the Great Uncomformity.
Back in the days when auto workers spray painted new vehicles, excess paint would harden and accumulate into a substance that looked like colorful gemstones. Jewelers have been making works of art out of "fordite" ever since.
Decades ago researchers announced a Rembrandt painting was not actually by Rembrandt at all. But on Sunday, researchers said they'd looked again and the painting probably was an actual Rembrandt. There are lots of challenges to verifying whether a Rembrandt is really his work or just a simulation.
