QUESTION: answer this: who played egon in the original ghostbusters movie??

ANS: Harold Allen Ramis


QUESTION: answer this: how many episode of walking dead season 7??

ANS: 16


QUESTION: answer this: how many species of mammals are in canada??

ANS: approximately 200


QUESTION: answer this: what was the oxygen revolution which took place??

ANS:
Great Oxygenation Event