3. An adult is made up of 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms. For perspective, there’s a ‘measly’ 300,000,000,000 (300 billion) stars in our galaxy. The atoms that make up your human body today are same atoms that formed during the Big Bang 13.7 billion years ago.
4. Human fingers can feel objects as small as 13 nanometers. If your finger was the size of the Earth, you would feel the difference between houses and cars.
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