https://phys.org/news/2018-11-teeth-environments-ancient-humans-neanderthals.html

Most prehistoric climate models are derived from large-scale records such as deep-sea cores or terrestrial sediment layers. These methods yield information on the scale of thousands of years, making it impossible to understand how seasonal climate patterns directly impacted ancient humans and their evolutionary kin.

My colleagues and I have found a solution using clues from our own mouths, as we detail today in an article in Science Advances. We used teeth to reveal climate records formed during the development of ancient hominins.