Global Warming Could Reverse Trend Toward Bigger Human Brains

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.


Early humans developed larger brains as they adapted to colder climates. A warming climate might reverse that trend. Imagine that, while you still can.

This is the result of an analysis by University at Albany researchers to be published in the spring edition of Human Nature, according to a press release from the University of Albany. The research suggests that human cranial capacity as an indicator of brain size grew dramatically during our evolution. The authors suggest a key environmental trigger to the evolution of larger brains was the need to devise ways to keep warm and find food in cold climates.

In other species, problems of cold are solved by hibernating or migrating, and/or by growing fur and fat. During human evolution, however, the authors surmise that solutions to the problems of cold produced progressively “smarter” strategies, such as the development of cooperative hunting techniques and more sophisticated tools and weapons. Increased brain capacity also brought with it the use of fire as a means to keep warm and cook, adaptations in clothing and shelter, and the development of more refined social skills.

So, if our smarts have caused all the trouble with global warming in the first place, will getting dumber help?

THE END...

of our annual funding cycle is fast approaching, on June 30, and we have a considerable $230,000-plus gap in our online fundraising budget.

If you value the nonprofit journalism you get from Mother Jones, and you can, right now is an important time to help us keep charging hard with a much-needed and much-appreciated donation.

payment methods

THE END...

of our annual funding cycle is fast approaching, on June 30, and we have a considerable $230,000-plus gap in our online fundraising budget.

If you value the nonprofit journalism you get from Mother Jones, and you can, right now is an important time to help us keep charging hard with a much-needed and much-appreciated donation.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate