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There is some research that suggests that viruses like the flu are really actually kind of at the razor's edge when it comes to mutation. They're mutating so fast that if they mutated much faster they would actually develop a lot of harmful mutations that could slow them down and cripple them and eventually literally drive them extinct.
— Carl Zimmer
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I sometimes think that courage is the thing that you need more than any other thing. It's fear that cripples us. It's fear that accounts for racism, it's fear that accounts for sexism, for xenophobia.
— Anna Quindlen
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