Does a kangaroo have big brain?

Kangaroos do not have particularly large brains compared to their body size. While they are intelligent animals capable of complex behaviors, their brain-to-body ratio is actually quite small.

Here's why:

* Their brains are relatively small: Compared to primates, for example, kangaroos have smaller brains in proportion to their body weight.

* They are not highly encephalized: "Encephalization" refers to the relative size of the brain compared to body size. Kangaroos fall within the average range for mammals, meaning their brain size is proportional to their body size, not exceptionally large.

However, kangaroos do possess impressive cognitive abilities:

* Problem-solving skills: They can solve puzzles and navigate complex environments.

* Social intelligence: They exhibit complex social interactions within their groups.

* Spatial memory: They can remember locations and navigate effectively.

So, while kangaroos may not have big brains in a literal sense, their brains are still sophisticated and capable of supporting their complex behaviors.