Jim Hakala recently hit the road with bins of fossilized fern, leaves, shark teeth, dinosaur bone, fish, petrified wood and a trilobite. On this trip, the senior museum educator was targeting fourth grade classrooms in northeastern Colorado with 12 of his “fossil kits,” courtesy of the CU Museum of Natural History.
For some comets, breaking up is not that hard to do. A new study led by Purdue University and CU-Boulder indicates the bodies of some periodic comets – objects that orbit the sun in less than 200 years – may regularly split in two, then reunite down the road.
Some of the beasts living in Patagonia 13,000 years ago were an intimidating bunch: Fierce saber-toothed cats, elephant-sized sloths, ancient jaguars as big as today’s tigers and short-faced bears that stood 12 feet tall and weighed nearly a ton. But by 12,000 years ago, they had disappeared. What happened?