askscience

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Why is uranium so special for atom splitting and fission? Why can’t we just split any old random atom and harness it’s energy?	2
If light is in a state of probability before it finally becomes are particle, does that mean it can see into the future?	1
If time is relative, how can we know the age of the universe? Would the age of the universe not be different from each relative perspective?	1
If hypothetically, two people were stood 1ft apart facing each other in a vacuum and then instantly both of those people started travelling backwards at exactly 50% the speed of light. What would each person see? And why?	1
How can we be sure the universe is roughly 13.7 billion years old knowing that time is relative. Isn’t it possible another observer in a different part of the universe knows it to be 8 billion years old?	1
When are we truly expecting the invention of real artificial intelligence, and what are the generally believed consequences of it?	1
How is it that the human female to male population ratio is almost exactly 50/50? What factors are at work to keep it even?	1
If life never existed in the universe, would the universe really exist?	1
If we are living in a simulation within a simulation as predicted by some, would the host ‘computer’ need increasingly massive computing power the further down the chain of simulations? Like an emulation within and emulation within an emulation.	1
If at a fraction of a second after the Big Bang when all matter in the universe exerted from a singular point. Wouldn’t that matter essentially collapse into a black hole/ have enough gravitational force that despite the outwards pressure not be able to escape its own event horizon?	1

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