>> it's based on dating of the strata that are out in wyoming, worland, wyoming, home of butch cassidy and the sun daps kid. you can date those profiles and you can measure the isotopes in the layers. you can see where the sources of carbon came from. you can see for example, that was about the time that mammals were beginning to make a run after the dinosaurs were gone. they disappeared. mammals came in and some of the mammals survived that period, they were really tiny. there were horses the size of cats roaming around at that time. so you can see a lot of very interesting things going on in that period. >> one of the things you did at georgia tech was to internationalize the institution. how do you see that translating at the smithsonian? is it a global institution? >> it is in a way because we like to see we were in 90 different countries in our activities, some of which represent physical platforms. in panama or in chile, the great telescopes, or in a place i visited recently, we monitor the health of these magnificent creatures. i think the interesting thing is a twist is we are