A few weeks ago, a train glided out of a station in Hangzhou, China, bound for Shanghai some 125 miles to the northeast. It arrived less than an hour later, cutting the usual commute time in half. Some trains on the line average 220 miles per hour, making it the fastest daily train in the world.
Amtrak has unveiled the nation's first biodiesel train, with a surprise twist -- the fuel is derived from beef byproducts. The Heartland Flyer train will conduct its biofuel trial run for a year between Oklahoma City and Fort Worth, The Guardian reports.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.