askscience

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I have an opal ring. Dim memories from Chemistry class long ago tell me not to get it wet, but other advise tells me water is fine, it is heat that kills an opal. What is an opal made of, and what can degrade the colour?	58
Is it true that if the average global temperature rises by 12.5F or 6C that feedback loops will create a runaway greenhouse effect that will turn Earth into Venus, killing the human race?	1
Is it really true that above a certain number of levels, going higher doesn't add more usable floor space to a skyscraper, because the elevators take up more internal room the higher the high-rise goes?	1
Quetzalcoatlus Northropi was the largest flying dinosaur. I notice the model has a large bump on the top of its head, very like the shape of a modern cassowary head. Any relation?	1
Neurosurgeons of reddit, can you distinguish a “female” brain scan from a “male” brain scan without knowing the patient’s name?	1
Is the current polar vortex collapse causing temperatures that would become typical in North American Winters if the fresh water ice melting from Greenland shuts down the Gulf Stream ocean current?	1
How are ‘female’ structured brains different from ‘male’ structured brains?	1
Can a hopf fibration be visualised as spheres whose centres are on (and cover) the surface of another sphere (and a still object) or because it has 4 dimensions, is it an object in constant motion and I’m not understanding its visualisation in 3 dimensions?	1
Would it be both feasible and a good idea for marine park rangers to set up a 'cleaning station' where human divers pry barnacles off whales who come there?	1
Why don’t people talk about time and reality dissolving and identity dissolution being possibilities from getting stoned from cannabis!	1

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