Yawning is so contagious that it can spread to dogs and monkeys.
Having fun is easy, but making a great impression on new pals can be even easier with these delightfully simple lifehacks.
This pint-sized predator hails from prehistoric China.
©2016 Mental Floss, Inc. All rights reserved. Mental Floss® is a registered trademark owned by Felix Dennis. mentalfloss.com is a trademark owned by Felix Dennis.