Human Body Daily Micro-Lesson

6 feet of DNA lives inside each of your cells — all 3 billion base pairs, 20,000 genes, 46 chromosomes. Day 2 of your body journey: how the double helix works, why you look like your parents but not a copy, and a 30-second fingerprint exercise that shows your DNA in action.

Everything your body does traces back to a single unit: the cell. Day 1 of your 30-day human body journey — learn the 5 key parts of a cell, why ATP is the energy currency that keeps you alive, and do a 15-second pulse exercise that puts 37 trillion cells in perspective.