Quoted: The big mammals — mammoths, mastodons and giant beavers — came later. They were Ice Age creatures, living in Wisconsin from between 2.5 million and 11,500 years ago.
“It’s a little bit like yesterday for a geologist,” Brooke Norstead, assistant director of the University of Wisconsin Geology Museum, said.
And just like yesterday, there was a big animal roaming that huge ice sheet — so vast you could walk to the North Pole on it without touching land — that may sound familiar.
“There was an animal called a stag moose,” Norstead said. “Imagine a supersize moose, with even more interesting antlers.”
Warren Porter is a professor emeritus of biology at the University of Wisconsin-Madison who studies animal shape and size.
“One of the evolutionary benefits of being a large or very large animal is … that you don’t have to deal with as much threat of predation and may be able to better defend your young,” Porter said.