This episode is all about penguins. All penguins belong to the family Spheniscidae.
Penguins are among the most bizarre and specialized birds in the world. Few other birds represent such a departure from what we think of as the standard avian model. The specializations of penguins—their adaptations—serve them very well for a life of diving deep into the ocean and of surviving in extreme cold.
These birds are wonderful examples of how “life finds a way”—how animals can evolve into radically different forms, adapt to incredibly harsh conditions, and still manage to look pretty darn cute.