Page History

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Four elements exist in all NASA 2016 Collections and in a smaller number of NASA 2017 collections. See the All 2016 and Some 2017 filtered view to identify these elements.

Elements in

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some NASA

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2016 Collections and

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all NASA

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2017 Collections

Five elements exist in all NASA 2017 Collections and in a smaller number of NASA 2016 collections. See the All 2017 and Some 2016 filtered view to identify these elements.

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Twenty-one elements exist in some NASA 2016 Collections and in no NASA 2017 collections. See the Some 2016 and None 2017 filtered view to identify these elements.

Elements in

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No NASA

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2016 Collections and

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some NASA

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2017 Collections  

Forty-eight elements exist in some NASA 2017 Collections and in no NASA 2016 collections. See the Some 2017 and None 2016 filtered view to identify these elements.

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