The prophet Abraham was born in a city with indoor plumbing and flush toilets. The technology was already 500 years old by then. You can google "mohenjo-daro" for the story of the first city with a sewer.

A dragon has a beard, a feathered body, and shoots lightning bolts from its eyes. The description is identical all over the world. Your article deals with other monsters from imaginary or unknown sources. Here is a thorough investigation of ancient records, carved into rocks or passed down verbally: http://saturniancosmology.org/