Anti-paparazzi clothing over-reflects light & blacks out faces when photographers use this

In December 2017 one unit of this cryptocurrency was worth 15 times more than an ounce of gold

This type of device can give you home theater sound without multiple speakers

Using satellites a lab named for this Frenchman good with coordinates made an atlas that updates in real time

(Kelly of the Clue Crew demonstrates a whirligig.) On a button whirligig spinning the disc stores potential energy in the strings; pulling on the strings turns that energy into the kinetic type--inventors were able to use this concept to make an inexpensive type of this spinning medical device