squirrel nuts

[drussila]

How do squirrels find their nuts again, once they have hid them? Is it by smell or memory?

[madhat]

combination of both. that's just a guess though.

[HGKinsey]

They actually have very bad memories and usually hit on them again when they dig up a 'new' spot for storage only to find they've used it before.

[SpecialAgent]

They put their hands down their pants.

But seriously, the use of smell will be very improtant, also the use of landmarks, or perhaps least likely, relying on a good memory.
However, it is now thought that they hide so many nuts without the intention of finding them again, instead to attempt to grow more trees. Quite clever for a Squirrel really.