New Scientist: Thank climate change for our daily bread. High levels of carbon dioxide in the atmosphere after the last ice age drove us to cultivate wheat.
Farming arose in the Fertile Crescent in the Middle East 10,000 years ago. Over the next two millennia, people all over the world took up the practice. This suggests that some global event triggered this simultaneous development.
A spike in atmospheric CO2 seen after the last ice age has been put forward as the culprit - the gas was released from the...