What is associated with: at the olduvai gorge in 1959 she hubby louis found a 175 million year old australopithecus boisei skull?

Based on the clue 'at the notch cemetery in plymouth vermont', what is the answer? Based on the clue 'at the oak ridge cemetery in springfield illinois', what is the answer? Based on the clue 'at the old north cemetery in concord new hampshire', what is the answer? Based on the clue 'at the old observatory here you can stand with 1 f...', what is the answer? Based on the clue 'at the olive garden you might start off with this ...', what is the answer? What is associated with: at the olympics a 4376 yard run equals this many meters? Based on the clue 'at the olympics you wont see this canine race wher...', what is the answer? Based on the clue 'at the opening ceremony athletes from this country...', what is the answer?