Aye-ayes use their long middle finger to pick their nose, a first for this lemur species. But scientists aren’t sure why these animals picked up the habit. Skip to main content.

This look inside an aye-aye's head shows just how far its long middle finger can reach while picking its nose. Anne-Claire Fabre/Renaud Boistel There's some nifty science vocabulary to go along ...

The aye-aye, a nocturnal lemur with a distinctively long middle finger, is the stuff of legends in its native Madagascar. Eugen Haag/Adobe Stock. Sign up for CNN’s Wonder Theory science newsletter.

This Primate’s Long Middle Finger Has a Startling (And Rather Gross) Use The aye-aye, long seen as spooky, spurred scientists to probe into primate nose-picking ...

The nocturnal Aye-Aye lemur, native to Madagascar, possesses a uniquely thin and elongated middle finger crucial for its survival. This remarkable adaptation allows the Aye-Aye to locate wood ...

The nocturnal Aye-Aye lemur, native to Madagascar, possesses a uniquely thin and elongated middle finger crucial for its survival. This remarkable adaptation allows the Aye-Aye to locate wood ...