Chaos Example:

YoY growth of frogs in the pond.
To predict the number of frogs next year, we measure the density (N) of frogs in the pond this year.
Brilliant mathematicians say, next years density of frogs (N1) will be calculated by

   N1 = λ*N*(1-N)

Where λ is a growth factor, that relates to the food and subsequently frog reproduction rate. Basically λ has to do with the frogs sexlife.
The curious incident of the dog in the night-time
by Mark Haddon!