SpaceWhy does our universe have something instead of nothing? In order to figure out how something came from nothing, we first need to explore the different types of nothing 51¶¯Âþ
MathematicsWhy the problem of P versus NP is worth $1 million Mathematician Tom Crawford explains what P versus NP means – and what makes the problem so fiendishly difficult to solve 51¶¯Âþ