1. Which century is referred to in the first sentence of the Introduction?
2. What did scientists believe they had done at the end of the century mentioned in the Introduction?
Drawn an accurate picture of the world
3. What is one thing the Introduction mentions that scientists could not have conceived of at the beginning of the 20th Century?
Women's voting rights
4. What do physicists believe in the beginning of the 21st Century?
The physical world has been explained by contemporary theory.
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