Hospital Corpsman Junior Enlisted Association 1st MARDIV Decal
Comparative brain anatomy. Notice how our brains are much bigger than other animals', but have the same basic parts & layout. Mammal brains do vary a lot by species, though, so I'm curious what animal they used for their "typical" mammal brain.
Los 15 mayores animales de la historia del planeta
New illustrated map of the Pangaea supercontinent is right out of the Middle…
I love this wonderful diagram by Ray Troll especially now he's updated the Pleistocene 2.6 Ma! http://www.trollart.com/fossils1.html