Daily Mail2d
What is your hometown known for? Interactive map reveals the unexpected UK towns and villages where world-famous gadgets were invented - from the TV to the toothbrush
In addition, there's Sir Isaac Newton's reflecting telescope which revolutionized astronomy ... while the Baird 'Televisor' was sold in the UK between 1930 and 1933. Tarmac, or Tarmacadam ...
PBS2y
Two Types of Telescopes
Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.