There is very easy to prove spiders can count. They can tell bigger object from smaller, so they have some concept of measure and comparison. They can tell 10 is bigger than 2 and so on.
The rest is only how precisely they can count.
There is very easy to prove spiders can count. They can tell bigger object from smaller, so they have some concept of measure and comparison. They can tell 10 is bigger than 2 and so on.
The rest is only how precisely they can count.