Albert Einstein's theories are more important than you may realise.
It's easy to dismiss Einstein's ideas of relativity as entirely theoretical, yet they have real-world implications. The theory of general relativity, for example, asserts that gravity influences time: time flows quicker for things in space than for those on Earth. And this has far-reaching ramifications for many space-based systems, including GPS accuracy. His theories are also fundamental to nuclear technology and explain how electromagnets function.