Chalk is a fine-textured form of limestone. It is composed of several tiny fragments of the calcite shells or skeletons of ...

Scientists from the University of California, Santa Cruz, and other institutions around the world arrived in Rio de Janeiro yesterday after spending two months at sea on the research ship JOIDES ...

Our friend Derek invited PaleoCris, Ashley, and myself out to a couple of cool sites he hunts for druzy quartz crystals and ...

Most of the excess carbon dioxide pouring into the atmosphere from the burning of fossil fuels will ultimately be absorbed by the oceans, but it will take about 100,000 years. That is how long it took ...