A mind-bending physics theory may explain why we have one reality instead of many.
Want to improve your mood? This study recommends you get walking, even for a short time, and even if your surroundings aren't picturesque.
Is the animal kingdom oblivious to our jokes or just a really tough crowd? Bill Nye explores the link between intelligence and humor.
It’s a question you ask yourself every time your best material fails to register in the eyes of a Labrador. Do animals other than humans have a sense of humor, or is it only human intelligence that can foster the inclination to be funny and recognize funny things?