Diesel vs. Gasoline: What’s the Difference?
Increase your IQ at the pump—and make sure you're choosing the right fuel for your car.
Can You Solve the Brain Teaser Elon Musk Asked in Job Interviews?
We admit, this question definitely stumped us.
13 Words That Will Help You Solve Almost Any Crossword Puzzle
Brush up on your crosswordese—those three- to five-letter, vowel-heavy words that frequently fill your puzzle grid.
14 Tricky Crossword Puzzle Clues That’ll Leave You Stumped
Ready for a challenge? These prime examples of wordplay and crossword lingo will give your brain a workout.
Can You Tell What’s Wrong with These Pictures? More Than 1 in 3 People Can’t
You might be suspicious of a model with zero wrinkles, but you're probably less likely to spot when a dog...
Fewer Than 1 Percent of People Can Pass This Color Test. Can You?
Naming the colors in the rainbow is easy, but can you differentiate between the different shades of yellow?
13 Secrets to Acing Crossword Puzzles
Here are the tips and tricks to make you an ace crossword puzzle solver. Sit back, put on your thinking...
The World’s Hardest Maze Only Geniuses Can Solve
Lose yourself in the most challenging maze: If you can find a way to solve it, you can consider yourself...
Can You Pass the World’s Shortest IQ Test? Less Than 20% of People Can
These questions even stumped students at Yale and Harvard
Can You Guess the Movie Based on Just One Photo?
These aren’t the iconic scenes from your favorite movies, so it’s pretty hard to guess! How many can you get...
18 Optical Illusion Photos That Aren’t What They Seem
There's more to these optical illusion photos than you can see at first glance!
Can You Solve the World’s First Crossword Puzzle?
Up for a challenge? Take a stab at completing the first crossword puzzle ever published.
This Man’s Tombstone Features a Cryptic Crossword Puzzle—Can You Solve It?
Eighty years before the first crossword puzzle, this tombstone spun word nerds' heads.
If Teresa’s Daughter Is My Mother: Answer to the Viral Riddle
Just what is this family dynamic? See if you can figure it out.
Quiz: So You Think You’re a Crossword Puzzle Expert? Prove It!
Test your knowledge of these words from the 2016 American Crossword Puzzle Tournament.
8 Genius Brain Boosters You Can Do With Your Kids
Simple brain exercises to do with your kids that help you stay sharp, get smarter and perform better at work...
6 Simple Brain Games That Will Make You Feel Stronger, Happier, and More Resilient
Try these games that tap your innate genius to build a happy and resilient brain.
Can You Find the Hidden Objects in These Pictures?
Challenge yourself with these optical brainteasers. If you're feeling super sharp, up the ante: 45 seconds for each puzzle. Game...