When it comes to human brain volume, bigger doesn't always mean better. Human brains expanded roughly by half between H. erectus and H. sapiens sapiens. The brain scientists aren't sure about the implications of this evolutionary trend. There are some disadvantages of increasing brain size. Big brains are energetically extremely expensive. And as humans continue to evolve, some scientists say our brains are actually getting smaller and admit that the shrinking human brain could eventually signal an evolutionary dumbing-down. This CEREBRART artwork evolves the topic started in my previous posts.