You Might Also Like
How great would it be to reconcile general relativity with quantum theory and truly have a theory of everything? That's what a band of theoretical physicists and their trusty hypothetical strings have been working on for decades.
As most of us know, our cars can become filthy, germy places unless we clean them regularly -- and they could be making us sick. But what about the air coming in through the vents? How can we make sure it's clean?