Sam, the partially bionic turtle, is back to see Dr. T, to make sure her shell is healing correctly. | National Geographic Animals

A new prosthetic hand from startup Esper Bionics is among the lightest on the market yet. During tests, volunteers managed to easily perform tasks, like opening cans and bottles, cutting fruit, and using digital devices. The creators claim that the hand's self-learning technology can improve user experience over time. | Mashable