989 On: Health

I could go on and on about electron clouds and atoms, but let’s talk about Oxygen and Iron as if they are people, with personality traits. So let’s describe Iron as a very outgoing person - it likes to give out lots of hugs and companionship - Iron is a giver. And Oxygen is desperate for attention. Oxygen is a needy friend. When the iron in our blood meets the oxygen in our lungs, the two cling together, but very conveniently for all us red-blooded lifeforms, they cling together in a very fragile connection, just exactly strong enough to be carried to all our body tissues, but not so strong it becomes trapped in the blood. It all seems pretty unlikely if you ask me. But it works! Iron and Oxygen - They're like packages from FedEx - you want your precious cargo safely stowed on the truck, but if it’s glued to the truck, it’s no longer useful - it needs to be just secure enough to arrive safely and be easily handed off.