Scientists looking for the secrets of deep sleep


The way marmots monitor their fat stores could hold lessons for human dieters. Marmots “are the ultimate yo-yo dieters,” said Greg Florant, a biology professor at Colorado State University in Fort Collins. Yellow-bellied marmots may enter their burrows in the fall carrying 30 percent to 40 percent of their body weight in fat. They emerge in the spring svelte with near zero body fat, he said.