A study of the evolution of longirostrine gomphotheres, an ancestor of the modern day elephant, suggests moving into open-land grazing helped develop their coiling and grasping trunks.
55 Interesting Facts About Elephants (for World Elephant Day)
Elephant trunks are very dexterous because they are so wrinkly
The Elephant in the Courtroom
Size Matters: Forest Elephants Important For Ecosystems And Humans
Strategies of protected area use by Asian elephants in relation to
Baby elephants don't know how to control their trunks - Upworthy
Asian elephants mourn, bury their dead calves: Study
The top side of an elephant's trunk is surprisingly stretchy
Elephants have evolved to be tuskless because of ivory poaching, a
About the Animals: Elephants
An Elephant Calf Can't Control Its Trunk For The First Year. Here's Proof
Operation Frozen Dumbo 3: Collecting elephant semen to bolster
My Summer Vacation: Three Weeks with Elephants, by Stanford Magazine, Stanford Magazine
Asian Elephant Facts: Conservation Status, Habitat & Diet