2 Answered Questions for the topic mass extinction
03/18/19
Why haven't weeds overtaken the entire planet?
Given how rapidly weed plants spread and grow, choking out all other plant life, how come after millions of years we haven't ended with forests full of thistle or pokeweed, as opposed to pines or...
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03/18/19
How is geological time divided into units?
Earth's history is divided into eons, which are divided into eras, which are divided into periods etc. Consecutive time units differ in their geology and/or fossil species. But what events are the...
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