Dinosaurs had a good run during the Mesozoic Era, from roughly 248 million to 65 million years ago, until an asteroid changed all that and ushered in the so-called Cretaceous-Tertiary Mass Extinction event, a slow, painful demise that wiped out most life on the planet, including all non-avian dinosaurs.
Most, but not all, life. Many marine families and land-based vertebrates survived. Here's a selection of modern animals whose ancestors walked or swam in the dinosaur era.
Photo Credit: Thinkstock