The CO2 and temperature changes that made the Vikings abandon their settlement in Greenland.

The last four glacial cycles, with the peaks indicating interglacials.

A reconstruction of temperature and CO2 concentration over time based on proxy data from an ice core.

A detailed record of the Palaeocene Eocene Thermal Maximum (PETM).

A reconstruction of temperature and CO2 concentration over time based on proxy data from an ocean sediment core.