The document discusses facts about the Loch Ness Monster, also known as Nessie. It notes that Nessie is described as a prehistoric dinosaur and was first sighted in 565 AD. Sightings over time have varied in credibility, with one notable 2003 sighting showing Nessie on land with a sheep in its mouth, while the most famous hoax involved a fake monster head on a toy submarine. Sources discussing dinosaurs, sea monsters, and beastly tales are referenced.