The author is saying that because of humans and the ways they are impacting earth is causing irreparable changes like causing animals to go extinct, etc.
One candy bar cost $5.21.
You divide 26.05 by 5 and you get 5.21.
CHECK:
5.21+5.21+5.21+5.21+5.21=26.05 OR
5.21*5=26.05
Answer:
their common passion for paleontology and mutual disdain for each other fueled their ambition, ultimately leading to the discovery of over a hundred new species in America. At the same time, their bitter rivalry damaged their reputations and left the two almost penniless at their deaths.
