without spinning the astronaut. From this, the research program developed cordless tools for a variety of purposes, including a cordless rotary hammer drill that could be used for extracting rock from the moon's surface.
These tools worked by exploiting the emerging technology of smallscale rechargeable electrochemical cells that could be grouped to form a battery pack capable of delivering enough power to generate the requisite amount of torque necessary to bore into the moon's surface crust. Today this technology has become common and widespread, with the majority of tools operating off a cordless battery pack that can be recharged between uses.
, space visors are now coated with diamondlike carbon coatings that are applied in thin films to the outside of the visor and toughen it massively. An offshoot of this technology is now available on Ray-Ban sunglasses, while Foster Grant historically bought the license to replicate early coatings to apply to its entire range.