About this video
This video explores why almost all mammals have about a billion heartbeats in their lives. It also talks about how size affects animals and even cities!
🧠 Quiz & Trivia
Test your knowledge after watching!
Q1 What animal did scientists give LSD to?
Answer: An elephant named Tusko
Q2 How many heartbeats do most mammals have?
Answer: About a billion
Q3 What is the name of the book that inspired this video?
Answer: Scale
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