| The first person to propose a contact lens system was Leonardo da Vinci in the 16th century. |
| Scientists estimate that 86% of all land creatures and 91% of sea creatures remain undiscovered. |
| Lawrence Bragg, an Australian-born British physicist and X-ray crystallographer is the youngest Nobel Laureate. He was joint winner (with his father, Sir William Bragg) of the Nobel Prize for Physics in 1915: "For their services in the analysis of crystal structure by means of X-ray", at the age of 25. |
| Chess was invented in India. |
| Bananas were discovered by Alexander the Great in 327 B.C. when he conquered India. |
| Scissors were invented by Leonardo da Vinci. |
| The electric chair was invented by a dentist. |
| Thomas Edison electrocuted a bunch of stray dogs and cats. He wanted to prove that AC current was very dangerous. |
| A human nose can remember 50,000 scents. |
| Memories are transferred in the brain from temporary to permanent storage while we sleep. |