Elon Musk Reveals Tesla’s Electric Semitruck

Elon Musk has always dreamed big, and tonight he showed off his biggest reverie yet: the fully electric Tesla Semi. Powered by a massive battery, it’s capable of hauling 80,000 pounds. It’ll even drive itself—on the highway, at least. The big rig, which Musk unveiled at Tesla’s design center in Hawthorne, California Thursday night, is …