Building a New Heart in achieve3000
What initially caused scientists to conduct this experiment with rat hearts?

Curiosity about whether they could rebuild rats' kidneys, livers, and lungs
Desire to help people in need of heart transplants because of heart disease
Desire to help people with heart disease by developing a new treatment
Curiosity about whether they could jump start a rat heart with electricity

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Curiosity about whether they could jump start a rat heart with electricity