The Earth's climate became cooler through the Tertiary (65 million years (Myr)) with frequent oscillations that increased in amplitude and lead to the series of major ice ages of the Quaternary ...

Climate change and the developments it spurs carry the narrative of the Quaternary, the most recent 2.6 million years of Earth's history. Glaciers advance from the Poles and then retreat ...

Margherita Mussi, published in Quaternary International, highlights how naturally occurring basalt spheres may have been used by hominin species as a type of tool for more than 1 million years.

Next in the chain come tertiary and quaternary industries, also known as the service industries. Tertiary and quaternary industries tend to be more important in more economically developed countries.