A new model of train capable of speeds of up to 180 miles per hour could be running on Amtrak lines as soon as next spring, provided the final testing stages go well. The new line of Acela trains are ...

Earlier this year, if you happened to be standing at a train station in New Jersey at a certain time of night, you might have seen a sleek new high-speed Acela zip by. The trains, which did 900 test ...

The speed of light is a fundamental constant, approximately 299,792,458 meters per second. It's the same for all observers and hasn't changed measurably over billions of years. Nothing can travel ...