| Question 1: Less than a year later substantial support for the synchronous nature of the black mat was provided by leading Clovis archaeologist, ________, also in the PNAS. | |||
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| Question 2: [1] This swarm would have exploded above or even into the Laurentide Ice Sheet north of the ________. | |||
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| Question 3: These animals included ________, mammoths, the giant short-faced bear and numerous other species. | |||
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| Question 4: Animal and human life not directly killed by the blast or the resulting coast to coast ________ would have starved on the burned surface of the continent. | |||
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| Question 5: The markers for the impact event also appear at the end of the ________. | |||
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| Question 6: [3] On 27 September 2007, a paper presenting the findings of the Acapulco group was pre-published online at the ________ website. | |||
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| Question 7: An airburst would have been similar to but many orders of magnitude larger than the ________ of 1908. | |||
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