Earth was really indeed a different place 100 million years ago. You could imagine Earth as it is now just by walking alongside the sea if you have some spare time and having little amount of adventurous soul, but if you traveled back 100 million years ago, Earth still seemed to be different yet feels the same. If you could actually picture Earth’s seas 100 million years ago, you might not probably feel that you traveled back in time 100 million years ago, except if you in land where weird animals roam. But in this case, it’s much easier to imagine Earth 100 million years ago if you look at…