Lewis Owen, head of the University of Cincinnati's geology department, deals in very small quantities.
He shows off what important stuff is left of one sample he brought home from the Himalayas. “That’s a little steel disk and on it is just a little smear of sand grains," Owen said.
With the samples he brings home, Owen is trying to map where glaciers used to be , where they've moved and how climate change will affect the world’s future. For a quarter century The University of Cincinnati professor has been making trips to China, Tibet, India and Pakistan.