I love to look in old encyclopedias at dinosaur fish and other aquatic critters from a long time ago. Anything with many rows of sharp teeth and reptilian slit eyes spark my interest. It is amazing how the many generations of ocean life end up fossilized and in stratified layers in the earth. And those layers when looked at – give scientists an organized glimpse into the past at the different species of ocean life that has lived and gone extinct. The further down they dig – the greater the distance they travel back in time.