11 Things We Didn’t Know Last Week

News, discoveries and … fun 1. Dogs that roll over and expose their bellies to another dog are not being submissive. (Learn more at Huffington Post) 2. It takes 15 million tons of salt to melt ice and snow on U.S. highways, roads and sidewalks each winter. (Learn more at Vox.com) 3. Babies remember new accomplishments if they soon fall asleep. (Learn more at BBC) 4. An avocado a day can lower bad cholesterol. (Learn more at Penn State via Futurity) 5. The …