Some of the most valuable historical records are not found in libraries or museums, but in ice, trees and layers of sediment.
Scientists and historians are increasingly using natural archives to understand how past climates influenced human societies. Ice cores, tree rings and lake sediments can reveal patterns of temperature, rainfall and environmental change over centuries or even millennia.
These methods are helping researchers reassess events such as famines, migrations and the decline of past civilisations.
For example, prolonged droughts have been linked to agricultural stress and political instability in several ancient societies, while volcanic eruptions can be traced to sudden cooling that affected harvests far beyond their source regions.
This does not mean climate alone determines history. Human decisions, institutions and technology remain central. But environmental conditions can shape the context in which societies operate.
The combination of scientific evidence and traditional historical sources is creating a more interdisciplinary understanding of the past.
Experts say this approach is particularly relevant today, as modern societies confront climate risks of their own.
History is no longer written only from documents — it is increasingly read from the planet itself.
