Readers like you keep news free for everyone.

More than 5,000 readers have already pitched in to keep free access to The Journal.

For the price of one cup of coffee each week you can help keep paywalls away.

Not now

# pewpew

All time

Dutch trains are trying out lasers to blast rail debris away

Placed just in front of the wheels, the lasers are able to remove leaves and other debris from the tracks while the train is moving.

10.0k

Dec 10th 2014, 3:25 PM

Scientists create laser device that can detect drunk drivers

By shining a laser through a car from the side of the road, researchers can measure blood alcohol levels inside moving vehicles.

13.3k

Jun 11th 2014, 4:50 PM