Have you ever wondered why our brains are a staggering seven and a half times larger than they should be for our body size? It wasn't a single event, but an improbable cascade of changes over 6 million years that gifted us our unique intelligence.

In this episode, we unravel the evolutionary lottery our ancestors won. We explore how taking our first upright steps on the African savanna freed our hands to make tools , how complex social life spurred brain growth , and how a crucial shift in diet provided the high-energy fuel for our metabolically expensive brains. Join us as we uncover why this specific, incredible sequence of events happened to us, and not to chimpanzees or dolphins.