"We come to believe that we can only learn when we are young, and that only ‘naturals’ can acquire certain skills. We imagine that we have a limited budget for learning, and that different skills absorb all the effort we plough into them, without giving us anything to spend on other pursuits."

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My own experience of over 60 years in biomedical research amply demonstrated that without the use of animals and of human beings, it would have been impossible to acquire the important knowledge needed to prevent much suffering and premature death not only among humans but also among [other] animals.

— Albert Sabin