#e <t>theory<t>geology<d>1912<n>continental drift<c>Germany<info>by Alfred Wegener
#e <t>geology<d>1935<n>Richter scale<c>U.S.<info>developed by American seismologist Charles Richter for measuring the strength of earthquakes.
#e <t>theory<t>geology<d>1938<n>Greenhouse effect<c>Britain<info>British engineer George Callendar analyses decades of temperature readings and describes what is later known as the Greenhouse effect.