" Animals at the high end of heartbeat longevity, such as mice, cats, dogs, horses, elephants, and whales, have the capacity for as many as a billion heartbeats within their life spans. Human hearts, on the other hand, can sustain nearly three billion beats in a lifetime. This significant difference in humans’ capacity for longevity demands explanation. The human body’s characteristics allowing for such extended activity on all levels (physical, mental, and spiritual) suggests uniqueness of design and purpose. It argues for a qualitative rather than mere quantitative difference between humans and the rest of Earth’s creatures. "

― Hugh Ross , Hidden Treasures in the Book of Job: How the Oldest Book in the Bible Answers Today's Scientific Questions