Its impressive, but what I find depressing is that for it to be portable they have to use internal combustion engines (that have the side effect of making it lo

Its impressive, but what I find depressing is that for it to be portable they have to use internal combustion engines (that have the side effect of making it look sound like a mosquito). Its sad because I guess that makes fossil fuels still the most energy dense and practical portable form of energy. Its am amazing achievement on the robotics side though.