Your Inner Fish: The amazing discovery of our 375-million-year-old ancestor

Frogs, bats, humans, and lizards are all just variations on a theme.

all of our extraordinary capabilities arose from basic components that evolved in ancient fish and other creatures. From common parts came a very unique construction. We are not separate from the rest of the living world; we are part of it down to our bones and, as we will see shortly, even our genes.