An old man was effortlessly cycling past me, laughing and pointing to the electric motor attached to his bike.

BBC: Canada��s greatest cycling trail

He, too, however, has a long to-do list before the motor embarks on a maiden voyage: His current motor has a tether attached for power.

FORBES: Breakthroughs

Electrodes attached to the brain of a host "encoder" rat in Brazil processed the motor-oriented mental activity for a desired behavior, such as pressing a lever on cue, and converted it into a signal that was then received by a "decoder" rat as far away as Duke's US campus.

ENGADGET

The rotor is attached to a flagellum, and, in his experiments, Friend measured enough force there to power the motor through the arteries in the brain.

FORBES: Breakthroughs