Hacker News new | ask | show | jobs
by frozenseven 843 days ago
Scary how someone can be so confident in their wrong information.

> An African Elephant has roughly 3x the number of neurons humans have.

An African elephant's brain is not a scaled up chimp brain in any way. African elephants have less cortical neurons than a chimp, and roughly a third of the amount that humans have.

> Dolphins beat humans in total surface area.

Animals even less related to humans and chimps, with no prehensile appendages, living in an environment where building stuff is exceedingly difficult. And of course their brains are obviously different from any great ape.

> Neanderthals are estimated to have had larger brains too!

And were just as smart as us and also had a scaled up chimp brain.

1 comments

animal :: cortical neurons (b) :: total neurons (b)

Human :: 16 :: 86

Gorilla :: 9.1 :: 33

Chimp :: 6 :: 22

African Elephant :: 5.6 :: 251

Chimps are generally considered more intelligent than gorillas.

Bottlenose Dolphins have 11-15b cortical neurons while humans are in the range 14-18 (range is measurement uncertainty). It's also worth noting these dolphins have a larger brain mass (1.6 kg) and larger cortical surface (3700 cm2) than humans (1.3 kg and 2400 cm2, respectively).

> with no prehensile appendages, living in...

So more than scale. Glad we agree. Seems you also agree that architecture matters too.

> Chimps are generally considered more intelligent than gorillas.

And chimps are genetically more similar to humans than gorillas. A chimp brain is more similar to a human brain than a gorilla brain.

> So more than scale. Glad we agree.

We absolutely do not agree. Notice how nobody suggested that a human brain is a scaled up version of an axolotl's brain? Yeah, that didn't happen. I do wonder why?