Imagine a tropical place called Laurentia, covered in shallow seas. Envision squid-like animals with long, pointed shells hunting for food. Picture the first tree sprouting, and the first millipede-like animal crawling onto land. This is not an imagi...
Imagine a world with volcanoes erupting as a single supercontinent slowly breaks apart. Fierce creatures over 16 feet tall and 40 feet long with huge, sharp teeth. Flying reptiles with a 30-foot wingspan prowling the skies. This is not a nightmare vi...
Imagine the blooming of the very first flower. Or a 3-ton sloth with massive claws standing as tall as a giraffe. And horses the size of small dogs that have toes instead of hooves. This is not a dream or vision of an artist or author. This is North ...
Imagine vast, flowing, 10,000-foot-thick ice sheets covering much of the land. See huge, elephant-like wooly mammoths roaming the tundra. Picture hunting monstrously large mammals alongside the first humans to travel to a new land. This is not an ima...