Twenty
in example sentence
Twenty years ago, Robert Axelrod used the prisoner's dilemma as a probe of the biological question: if we are here because our ancestors were such fierce competitors, how does cooperation exist at all?
More example sentences with word twenty
Twenty
years ago, doctors would have cut off my leg and hoped, and there was a 15 percent survival rate.
Twenty
percent of kids do not have those relationships.
Twenty
years later, they succeeded and developed the polio vaccine.
Twenty
years ago, a new generation of antipsychotic drugs were brought in; the promise was they would have fewer side effects.
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