Living organisms emerged 3.8 billion years ago. Yet, it was only 500 million years ago when they first left the comfort of the oceans for what must have been a truly harsh existence on land. This was a momentous step toward the grand diversity of life we see today, from lovely flowers to insects in all their variety, all the way up to the wondrous agility of human limbs—all presented here in a pictorial scroll of evolution on a grand scale.