An anonymous reader writes "It turns out that climate change was good for humans in the past. Scientists have discovered that rapid climate change that occurred almost 80,000 years ago sparked surges in cultural innovation that possibly helped propel early modern humans into a more advanced society.
In order to study the ancient climate of the past, researchers examined a marine sediment core off of the coast of South Africa. Cores are extremely useful when looking at past temperatures; over the years, layers of sediment are laid down with the passing seasons. When scientists core an area, they're essentially taking a several centuries-long sample of the climate of that region. By looking at the different layers, they can then reconstruct the past."Link to Original Source