The energies involved are so large, and the nucleus is so small that physical conditions in the Earth (i.e. The rate of decay or rate of change of the number N of particles is proportional to the number present at any time, i.e.
NSF Postdoctoral Research Fellow at Stony Brook University.
I study how bone tissue, growth, and metabolism evolve at macroevolutionary time scales.
Aerial Photography - The various techniques of taking photographs of natural or cultural features from the air, using balloons, airplanes, satellites, and other sources, in order to study the features in their entirety from a top-down (bird's eye) view.
Aerial Reconnaissance - The technique of searching for sites and features, both cultural and natural, from the air, often using aerial photography or the human eye.
It has been possible to observe continental drift directly with GPS satellites: GPS Time Series Furthermore, GPS-measured rates agree rather closely with continental-drift rates over the last several million years: Global Tectonics and Space Geodesy -- Gordon and Stein 256 (5055): 333 -- Science The latter sort of estimate gets its time values from radiometric dating, so GPS measurements provide a good check of them.