This episode explores Darwin's theory of natural selection, detailing how species evolve. 

The process involves genetic variation within populations, leading to a 'survival of the fittest' scenario where better-adapted individuals thrive and breed. 

Successful breeding ensures that advantageous characteristics are passed on to subsequent generations. This process leads to the spread of beneficial mutations within a population, such as faster animals catching prey or camouflaged creatures avoiding predators. 

Specific examples, including the Alaskan Wood Frog's ability to freeze and the Komodo dragon's bacteria-laden bite, illustrate these survival adaptations in action.

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