Massive schools of cod fish once dominated regions of the North Atlantic Ocean.

The remains of a dinosaur found in the Hell Creek Formation of North Dakota are so well preserved that some scientists are just “gobsmacked.”

British researchers have developed a reliable method for determining the age of ancient clay pottery. The dating technique is based on the fact that the clays used to make pots over the centuries demonstrate a very consistent rate of change.

For decades, museums and textbooks confidently asserted that mud rocks—such as limestone, siltstone, mudstone, and shale—were formed over vast eons as super-fine sediments slowly settled to the bottom of shallow lakes or seas.