CLEVER CREATURES
The world’s finest human minds have struggled to pin down exactly what intelligence is. No one is quite sure how to define it (though it’s probably something along the lines of an ability to absorb and apply knowledge) or measure it (even IQ tests might simply assess a person’s ability to perform in IQ tests). And if it’s an elusive concept in humans, what chance have we got when it comes to probing the intellectual worlds of other species? Happily, we tend to know it when we see it. So, here’s our survey of the brightest of the bunch.
CLEANER WRASSES
Meet a spectrum of species whose mental agility and problem-solving skills will put some humans to shame.
An ability to recognise oneself in a mirror has long been regarded as an indication of self-awareness. It’s an easy one
