The First Steam Locomotive
On February 21, 1804, Richard Trevithick's unnamed locomotive hauled 10 tons of iron and 70 men along 9 miles of track in Wales. It was the first time a steam-powered vehicle had successfully run on rails.
The journey took about 2 hours at an average speed of 5 mph. The locomotive broke several of the brittle cast-iron rails, but it proved something revolutionary: steam power could move heavy loads on rails.