The ecosystem within the human body makes bitcoin look like child’s play and bitcoin is pretty amazing #GodIsAmazing 🙂http://blogs.discovermagazine.com/crux/2018/08/13/vitamin-b12-essential/
The Evolutionary Quirk That Made Vitamin B12 Part of Our Diet - The Crux

Our bodies can make it, but we still need to eat it. Blame evolution.

The Crux