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More people buy e-bikes than electric cars. Here’s how a bill would make them cheaper.
Dec 8, 2021 8:00 PM
These gliding drones could deliver supplies from Air Force planes to the battlefield
Dec 8, 2021 3:00 PM
Featured in DIY
Sep 11, 2004
Hit the Road, Mac
This Czech geek's Apple G4-equipped Tatra is the ultimate computer on wheels.
Sep 11, 2004
Overclock Your Car
Want more horsepower? Put away the Snap-ons–this is a job for a gearhead with a laptop.
Aug 20, 2004
Making Steel with Beach Sand
Thermite powder yields pure, white-hot iron when lit. Don't try this one at home.
Jul 22, 2004
Eat your heart out, Aibo
Why buy a robot that follows a colored ball when you can spend hundreds of hours building your own?
Jul 20, 2004
Uncovering a Natural (Magnetic) Attraction
A long walk on the right beach could reveal magnetite hiding in plain sight.
Jun 11, 2004
Take the Shackles Off Your Cellphone
Cell providers lock your phone for a reason; here are a few reasons to unlock it.
May 10, 2004
Car H2.0, Where Are You?
With the flood of in-car GPS navigation systems available today, you'll never have to ask for directions again.
May 01, 2004
Melting the Unmeltable
There are many ways to melt metal, but an arc furnace can liquefy almost anything you put in it, using only electricity.