Answer:
2.) He explored the ocean for many years.
3.) Lately he worked with space scientists.
4.) Lonnie Thompson studied glaciers for over 40 years.
5.) He learned a lot about the past.
6.) Over many years, the glaciers. melted.
7.) The Wallenda family preformed risky activities for seven generations.
8.) Scientists learned more and more about how brain chemicals affect risk.
9.) Sylvia Earle studied the ocean for many year.
10.) People climbed Mt. Everest since 1953.
Explanation:
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