Introduction

The tempo of most animal heart beats is related to size, how big an animal, how small. The bigger the scale of the animal, the slower the tempo of its heart. We don't think a lot about tempo, how fast or slow something goes,. So we're mostly unaware of how tempo and scale affect things. But recently i've been talking to this unusual group of people who've made me think about those two things a lot. And i've come to understand how important scale and tempo are in determining what happens in the world. This is invisiblia.