For example, bubbles of air in glacial ice trap tiny samples of Earth’s atmosphere, giving scientists a history of greenhouse gases that stretches back more than 800,000 years. The chemical make-up of ...
A series of rocks hiding around Colorado's Rocky Mountains hold clues to a frigid period in Earth's past when glaciers several miles thick may have covered the entire planet.
Nov. 21, 2024 — A new study shows that the oceans were less cold in the early 20th century (1900--1930) than previously thought. During this period the ocean appears too cold due to the way some ...