Trivia:

• In Einstein's famous 1905 paper, he didn't actually write E=mc². He wrote the equivalent: m=E/c².
  
• In 1901, the entire Indian subcontinent, with a population totalling 300 million, was administered by a British ruling caste which consisted of no more than 1,000 men.
  
• From 1948 to 1963, Porsche manufactured more than 150,000 tractors.