What's the relationship of bipedalism and brain size in the fossil record?

Question

What's the relationship of bipedalism and brain size in the fossil record?

Answer 1

As hominids became smarter, they learned how to use their hands on more important tasks, and after many generations of hominids, they started to permanently walk upright.

Answer 2

Within the past 2 million years, as we hominins made the transition from meat-eating scavengers, to meat-eating hunters, our brain capacity steadily increased!

Answer 3

Bipedalism came first, and as a result or connected to this, humans acquired larger brains. Humans could see predators from farther away by standing in the grasses of the savannah, that's one connection.

Answer 4

We acquired bipedalism first.  Lucy walked upright and had a small brain.