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) >> Enter our $25,000 Rewards for Good Sweepstakes! See official rules. 4. An avocado a day can lower …

How Well Do You See Colors?

Do you have “color vision deficiency,” otherwise known as color blindness? It affects about 32 million Americans — eight percent of men, 0.5 percent of women — but there are now new websites and smartphone apps to help people identify difficult-to-see shades and hues, the Wall Street Journal reports. In addition, be aware that changes in color vision in older adults could be a sign of other health problems or the side effect of certain medications, including Viagra and some …