Category: Brain Dump

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,...

Are any other animals monogamous?

Question from Helen Cross There are examples of monogamy throughout the animal kingdom. Gibbons, swans and black vultures are all known to pair up with a single partner, although infidelities do occasionally happen. Wandering...