In reality it was like this: Earth was colonized
by the Zycronites, who developed the ability to travel from one space dimension to another at a
period several millennia after the epoch of which we speak. They arrived here eight thousand
years ago. They brought a lot of plant seeds with them, which is why we have apples and
oranges, not to mention bananas—one look at a banana and you can tell it came from outer
space. They also brought animals—horses and dogs and goats and so on. They were the builders
of Atlantis. Then they blew themselves up through being too clever. We’re descended from the
stragglers.

Author: Margaret Atwood