kangaroo

Make all the jokes you want, but the methane emitted in the form of cow burps and farts is actually a major source of greenhouse gas emissions. That could soon change, however, thanks to bacteria found in baby kangaroo feces.

Just like its animal cousin, Festo's BionicKangaroo is able to store energy from the landing phase of a jump and reuse it efficiently for more jumps. The technology may hold the key to more energy-efficient machines based on both pneumatic and electric drive technologies.