Here is one of the truest and most beautiful facts in all of science, rarely discussed but mind-openly important; light is fast. Faster than anything. It moves about three hundred thousand kilometres every second, so quick that on Earth it seems to arrive instantly, the moment you flick a switch. Space, however, is so vast that even light, the fastest thing there is, takes time to cross it. And that changes everything about what it means to look up at the sky.

For most of human history, money & currency were transacted through memory. Long before coins, before kings, before banks, people kept track of who owed what to whom, in their heads, and in their relationships (in the form of favours, not coins). Can you imagine a society who is constantly helping each other, because helping and giving favours is the exact form of currency that people transact with? Sounds perfect, and anthropologists who study the earliest economies have fou