Category: Brain Dump

How can we eat certain meats raw?

Question from Eduardo Raffaele Like us, animals carry microbes, most of which live on the skin or in the digestive system. Whole cuts of beef tend to be safe to eat rare because their...

Why do some geysers erupt regularly?

Question from Davood Ahmed Each geyser sits atop a unique network of cavities and fractures within a rock, and it is unclear what differentiates regularly erupting ones. Geysers require a rare combination of geothermal...

How do decompression chambers work?

(Image credit: Alf van Beem) Question by Penny Walters Hyperbaric chambers work by reproducing high atmospheric pressure to reverse the symptoms of decompression sickness (‘the bends’). When scuba diving, nitrogen from a diver’s air...

Why do animals play dead?

(Image credit: Popovkin) Question from Li Yung Playing dead, a  behaviour known as thanatosis, has been observed in several species in the animal kingdom. In most cases, such as that of the American opossum,...