Featured in Head Trip
This maze has three solutions. Can you solve them all?
Give your brain a wee workout with this puzzle.
Decipher mysterious sounds with this matching game
From movie sound effects to cryptic waveforms, sound takes on many forms.
How Disney fools your brain to make lines feel magically short
Happily ever after you move through the queue.
This pattern changes as it gets closer to your face
Try holding the shapes steady. You can't!
Why does space look so dark?
Stars may twinkle up above, but the rest is as dark as can be. Or is it?
Turn any magazine into a flashlight with this optical illusion
Batteries not required.
How to destroy your friends and family in 4 popular board games
With these tricks, you'll be unstoppable.
What animal do you see in this image of a nebula?
It's a classic example of pareidolia.
These six photos were snapped by satellites. Can you figure out where?
From famous river deltas to breathtaking canyons.
Does the ‘world’s hardest maze’ live up to its name? Give it a shot.
It's trickier than it looks.