Superclusters - regions of space that are densely packed with galaxies - are the biggest structures in the Universe. But scientists have struggled to define exactly where one supercluster ends and another begins. Now, a team based in Hawaii has come up with a new technique that maps the Universe according to the flow of galaxies across space.

The 'overview effect' is a phenomenon astronauts experience when they see the Earth from space.

How can we make sense of the world together, and what stops us from doing so? Many of the thinkers we've interviewed on Rebel Wisdom talk about the importance of creating coherent sensemaking - or 'collective intelligence'. Jamie Wheal is one of the world's top experts on flow, the author of the bestseller "Stealing Fire".