A three-year-old just became Arizona's youngest Mensa member after she memorized world geography and taught herself Spanish.

Neha Ramu, a 13-year-old girl living in London, has a higher IQ score than Stephen Hawking and Albert Einstein. Her score of 162 is the highest possible mark in the Mensa IQ test for baby geniuses under 18. Scores above 140 are generally considered to be genius level; the average adult score is 100.