Puzzles

摘要

1 Pluto lost its status as the solar system's outermost planet in 1979. Why? 2 A carbonated form of hydroxyapatite, a calcium phosphate mineral, makes up 70 per cent by weight of your what? 3 Space scientist George Carruthers invented what sort of camera, which monitored Earth's upper atmosphere for signs of pollution from the moon during the Apollo 16 mission in 1972? 4 What shaped nose might you expect of Tursiops truncatus? 5 In the general taxonomic classification, what rank comes above a genus and below an order?