Does brain size matter?
The size of brains in the animal kingdom is wildly different, from melon-sized in blue whales to pea-sized in shrews. But does a bigger brain mean a more powerful one?\n \nCrowdScience listener Bob wondered just this as he watched various sized dogs running amok in his local park: the Great Dane has a much larger brain than a Chihuahua\u2019s, yet the job of \u2018being a dog\u2019 surely requires the same brain power. So why have a big brain if a small one would do?\n \nA search for the answer takes Geoff Marsh to dog agility trials, behind the scenes at London\u2019s Natural History Museum and a laboratory that studies bumble bees. It turns out that size does matter, but not in the way you might think.\n \nPresenter: Geoff Marsh\nProducer: Dom Byrne
(Photo: Great Dane HARLEQUIN and a chihuahua Getty Images)