Featured in print
Turn any magazine into a flashlight with this optical illusion
Batteries not required.
These two red dots are actually identical. Here’s how
It’s all thanks to the Ebbinghaus illusion.
Here’s why your brain is so bad at those ‘spot the difference’ games
They entertained you for entire minutes at the dentist’s office.
How a zebra’s stripes put bloodthirsty flies into a tailspin
This optical illusion serves a purpose.
What it really takes to power your home for a day
Here's how much gas, coal, oil, wind, solar, water, or nuclear fuel is required.
What is a horsepower?
It's enough to power a coffeemaker or boil 2.2 gallons of water.
Robert Afzal is developing powerful laser blasters for the U.S. military
Dynamite with a laser beam.
In photos: updating New York’s vast and fragile telecom backbone
The cables that keep information flowing through the Big Apple are undergoing a transformation, from aging copper to strong and fast fiber.
Hackers are attacking the electric grid
And computer scientists are trying to stop them.
Get off the couch and under a barbell with this weightlifting starter kit
You don't need to be The Mountain from Game of Thrones to start moving mass.