Overview
In the early part of the twentieth century, the researcher Marie Tharp worked on a detailed map of the bottom of the ocean. And then she made a discovery—a chasm down the middle of the Atlantic Ocean. Could this discovery help prove the age-old theory that the continents on Earth move?
The second book in a series about scientific wonder. Dreaming, daring, thinking, and doing. For researchers ages 6 and up.
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