How many bones do sharks have? What is sphenopalatine ganglioneuralgia the scientific term for? What does USB stand for? What is the largest desert on Earth? In which year were the first collisions achieved in the Large Hadron Collider? What is the heaviest organ in the human body? What is the rarest blood type in humans? In which year was Pluto reclassified as a Dwarf Planet? .