Today I learned that after many large animals were extinct, the avocado almost disappeared

Today I learned that after many large animals (such as mammoths) were extinct, the avocado almost disappeared because it had no way to disperse its seeds. The development of agriculture saved avocados (and Mexican food).

Source: http://www.smithsonianmag.com/arts-culture/why-the-avocado-should-have-gone-the-way-of-the-dodo-4976527/