While it may not be as heartwarming as Cal Worthington's dog, Spot, Boston Dynamic hopes its newest quadrupedal robot, SpotMini, will find a place in your home. The SpotMini is a smaller version of BD's existing BigDog line of robotic pack animals. It's roughly 55 pounds -- compared to the Alpha Dog's 240 -- and stands about two feet tall. Unlike the larger versions, SpotMini doesn't rely on hydraulics. It's completely electric -- reportedly the quietest Dog that BD has ever built -- and can run for up to 90 minutes between charges.