They’ve talked about it, they’ve made prototypes and now finally here it is: a human-powered car (The HumanCar) that can reach speeds of up to 80 miles per hour. Beyond just sounding like one, this invention bears an uncanny resemblance to the walkable vehicle from the Flintstones. Love it, hate it, mock it or berate it this strange new vehicle is available for $15,000 as of Earth Day 2008!