naturalplastic wrote:
The the furry mammalian wooly mammoths, cave bears, sabor tooth cats, rhinos, giant sloths, etc back then just didnt look like that.
True that, but folk tales go back a long time. We do not know when communication began with humans? it now appears that neanderthals were capable of communicating with each other so oral traditions may go back prior to the dawn of humanity.
Of cause Plesiosaurs (the likely candidate for lake monsters) went extinct 65 million years ago when humans were mouse like mammals scurrying around the feet of dinosaurs. But we do not know if freshwater versions of this dino persisted into the megafauna times. Perhaps the rather hungry neanderthals came across these water beasts and slew them to access their tasty meat (I'm sure they tasted like chicken). I'm not sure but freshwater bodies don't retain fossils that well but yes, you would think things that big left remnants beyond the end of the dinosaurs?
Then of course there is the interdimensional theory where perhaps these critters can come and go as they please through portals in time and space from another dimension. Nessie might be pushing it but could explain the shape shifting skinwalkers terrorising folk in north America and the global presence of bigfoot.