Pierre Pica of France's National Centre for Scientific Research studied the language of the

people, an Amazon indigenous group, and found they had no word representing a number greater than

.

The Munduruku of the Amazon have an intuitively

understanding of numbers (non-linear).

The above book was written by

, a British journalist who graduated with a degree in mathematics and philosophy from Oxford University.

Prof. Karen

at the University of

watched a pride of lions in the

and, while varying group sizes of lionesses returned to their prides at dusk, she played audio recordings of varying numbers of lionesses roaring together. Using this method, she determined that lions use number sense when determining whether or not to attack one another.

Researcher Prentice

tested babies' (16 - 30 wks) reactions to varying numbers of dots, and found they stared longer when the number of dots changed.