Evolution of the avocado

"Since fruits propagate by seeds, their progeny doesn’t grow far from the tree, as the proverb goes; their only chance of spreading their seeds across the land, then, are the animals who eat the fruit, along with its seeds, then “plant” those elsewhere when they poop. The avocado’s abnormally giant seed presents anything from a severe digestive hazard to a death sentence for contemporary earthly species but, apparently, avocados coevolved with ground sloths and were originally eaten by gomphothere — elephant-like creatures that lived during the Miocene and Pliocene, between 12 million and 1.6 million years ago, who happily reaped the fruit with their hefty trunks, crunched them with their massive teeth, and passed the seeds comfortably through their oversized digestive tract." Link