How Much of the Air Around You Has Been Breathed Before?

One breath holds about ten sextillion molecules - and the atmosphere holds about as many breaths. — Chapters 0:00 Two Numbers, Twenty-Two Zeros Apart 1:21 One Breath Is Not Small 2:23 The Lung Only Edits the Breath 3:52 The First Minute 5:21 The Door, the Building, the City 6:36 Weather Takes Custody 8:31 The Most Famous Breath in History 10:21 Molecules Are Temporary Partnerships 11:37 The Part Plants Return, and the Part the Ocean Holds 13:29 Has All Air Been Breathed? And a Breath from Your Own Past 15:36 The Answer — Almost Certainly Yes, but Not as a Percentage 17:21 Life Reframe — Borrowed Atmosphere — A new episode every week. This channel takes one ordinary thing and follows it until it stops being ordinary. If you spotted an error, say so in the comments. Corrections get pinned. — Credits Footage via Pexels: 정규송 Nui MALAMA, Miguel Á. Padriñán Sound effects: Mixkit