Students often consult the geological timescale when studying mass extinctions.

Understanding geological timescales helps scientists reconstruct Earth's climate history.

Students learned to read the geologic time scale to understand when major events like mass extinctions occurred.

Scientists presented a comprehensive safety assessment for the proposed deep geological repository to reassure the public about the long-term containment of spent nuclear fuel.

Researchers compare sediment layers across continents to better understand geologic time scales and the Earth's ancient climate.

Several countries are collaborating to develop deep geological repositories to ensure the safe, long-term storage of high-level radioactive waste.