SciShow Addresses the Common Claim That Humans Replace All Their Cells Every Seven Years

SciShow host Hank Green addresses the often cited internet claim that humans replace all their cells every seven years. While many cells do die off and replace themselves over time, some don’t, and the lifespan of cells varies greatly by type.

Glen Tickle
Glen Tickle

Amelia's dad. Steph's husband. Writer, comedian, gentleman. Good at juggling, bad at chess.