For the evolution of smarts, parents matter
![](https://natalieparletta.com.au/wp-content/uploads/2020/06/200603-New-Caledonia-crow-1024x568.jpg)
Humans are not the only species that enjoy prolonged childhoods: elephants, whales, dolphins and some bats and birds do also.
Is this what makes us smart? And if so, how important are long-suffering parents?
Published by Cosmos.