Feeds

Researchers link human skull size and climate

Hot head v cool head v Mr Potato Head

Secure remote control for conventional and virtual desktops

Humans grew bigger brains as the climate they lived in got cooler, according to researchers at the University at Albany, New York.

The researchers concluded that humans got brainier because they had to adapt to a more challenging environment. They base this assertion on a plot of cranial capacity of 109 fossilised human skulls against the corresponding paleontological record of two million years of changing climate.

As well as a relationship between a cooling earth and growing skulls, the researchers report that where the skulls were found matters, too, because the further you get from the Equator, the more varied the weather becomes.

Gordon G Gallup Jr, a professor of evolutionary psychology at the university, and co-author of the work along with graduate student Jessica Ash, commented: "It became clear that seasonal variation in climate may also have been an important selective force behind the evolution of human cranial capacity. Specifically, we found that as the distance from the Equator increased, north or south, so did brain size."

Lower temperatures and seasonal variations threw up new challenges for the early human, such as fluctuations in the availability of food and the need for fire and clothes to keep warm, the researchers argue. More co-operation would have been needed to find, preserve, and store food; and the people would have needed more complex tools. Along with that, more intricate social structures would have evolved, which in turn would have required more grey matter.

The researchers suggest that having to adapt to the impact of lower temperatures could account for as much as 50 per cent of the increase in the size of our skulls.

The researchers don't mention whether or not the extra small human skull found on the island of Flores was included in the sample. ®

Next gen security for virtualised datacentres

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
NASA to reformat Opportunity rover's memory from 125 million miles away
Interplanetary admins will back up data and get to work
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?