Math Quiz

When the Amazon Kindle was first released, it sold out in five-and-a-half hours. The groundbreaking e-reader remained out of stock for 5 months! The device's name came from branding consultants Michael Cronan and Karin Hibma, who suggested ‘Kindle’, meaning to light a fire.

The earliest known precursor of sunglasses was invented in prehistoric times by the Inuit. They made snow goggles out of walrus ivory that had two narrow slits that reduced the wearer’s exposure to sunlight and protected them from going snow-blind.

Robert Hooke unknowingly discovered plant cells. In 1665, he used a compound microscope to examine a wide variety of objects. On observing the surface of a cork, he noted down 'pores', which were in fact plant cells!