A graph, devised by D. M. Raup, on which the number of taxa becoming extinct is plotted against the time intervals between extinction events. It shows, for example, that an extinction of 30% of species occurs, on average, about every 10 Ma.
Kill curve
- Russian borer
- Russian Civil War (1918–21)
- Russian Federal Space Agency
- Russian Revolution (1905)
- Russian Revolution (1917)
- Russo-Japanese War (1904–05)
- Russo-Turkish Wars (1806–12)
- rust belt
- rustbelt
- rusting
- rusts
- ruthenium
- rutherford
- Rutherford and Royds’ apparatus
- Rutherford Appleton Laboratory
- Rutherford back scattering
- Rutherford backscattering spectrometry
- Rutherford, Daniel
- Rutherford, Ernest
- Rutherford, Ernest (1871–1937)
- Rutherford, Ernest, Lord (1871–1937)
- rutherfordium
- Rutherford, Lord (1871–1937)
- Rutherford, Lord Ernest (1871–1937)
- Rutherford model