The Special Theory of Relativity - It can seem mind-bending to get your head around, but 18-year-old high school student Ryan Chester has successfully explained it in fun way, including cars and popcorn!
We still have a long way to go when it comes to untangling the mysteries of the Universe. Stuart Clark takes a look at some of the most perplexing questions yet to be answered by science and how close we are to finding the facts about space.
Theories of science have ignored time... until now. This idea reveals how it created the Universe - and you, writes Robert Matthews.