Chapter VII - Silent Forests, Crowded Oceans
I'm still slowly working my way through this book. Chapter seven discusses the Carboniferous coal forests and their denizens. Those old forests sound like gloomy, creepy places with only the odd sursurrus to break the silence. There were dragonflies as big as seagulls and centipedes as big as a human. It makes the centipede alien in Futurama feel not so far-fetched, doesn't it? There are some suggestions that the growth of such animals was promoted by an increased level of oxygen relative to today.
And we aren't to forget to crabs and sharks in the sea.