1. Laws of Planetary Motion   Euclid   Christian Barnard   Johan Kepler   Neels H. D. Bohr   Hint Half-n-half Clue   2. Neptunium   Michael Faraday   Henry Cavendish   Sir Humphry Davy   Enrico Fermi   Half-n-half Clue   3. Aluminium   Sir Humphry Davy   Hans Christian   Alexander Fleming   Christian Barnard   Half-n-half Clue   4. Principles of Geometry   Johan Kepler   Hans Christian   Charles Darwin   Euclid   Half-n-half Clue   5. X-rays   William Harvey   Alexander Fleming   Wilhelm K. Roentgen   Hans Christian   Half-n-half Clue   6. Calcium   Sir Humphry Davy   Wilhelm K. Roentgen   Sigmund Freud   Sir Fredrick Grant Banting   Half-n-half Clue   7. Oxygen   Sir Humphry Davy   Sir Fredrick Grant Banting   Karl Wilheim Scheele   Alexander Fleming   Half-n-half Clue