five
Many in the past few years.
Mermaids have always been mythical.
65
There are no mermaids and there are certainly no fossils of them. They are a superstitious hangover from the past when people knew very little about the natural world.
There is really no explaination.
An average of about 650 per year are reported, so multiply that by 5 and there's your answer.
That is has many things about everyone and everything in Australia and about their past treasures
5
199 billion is the past
There is no way to know. Many people do think that the bible refers to UFO's and/or aliens but there is no way to prove it one way or the other.
17 animals have been etinct in the past 200 years
Because many of theses myths were inspired by sightings of extra terrestrials visiting man in the past. Man explained what they were seing by assuming they were gods, goddesses and mythological creatures.