Albert Einstein changed the world forever 100 years ago this month by publishing his theory of general relativity.
Relativity is now a centerpiece of modern physics, the reason GPS satellites and mobile internet exist, and why Einstein is easily the most famous scientist in history.
But a legendary status doesn't mean you're infallible. Einstein made plenty of errors and oversights, and sometimes, he was flat out wrong.
Here are five of Einstein's biggest mistakes explained.
1. A notable error shows up in Einstein's most famous work: Relativity.
His theory of relativity describes gravity, space, and time in math equations — which no one had successfully done before.
But in order to get the math right, Einstein had to create a new constant number (an unchanging value, like 'pi' or 'e') and stick it inside his general relativity equations to balance them.
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