Scientist Know This Because They Have Discovered Fossils Or Bones Of Prehistoric Sharks From Millions Of Years Ago Which Shows That There Bone Growth Was Much Larger Than Sharks Today.
I'm sure there are various ways they figured this out. One way is that you can find sharks teeth and other oceanic fossils hundreds of miles inland.
A moat could possibly have alligators or sharks depending on the type of water.Take your moat to be freshwater; it could possibly have alligators or bull sharks, probably it has nothing bigger than a carp.However take your moat to be saltwater; there is a much larger variety of sharks that could inhabit it (bull sharks included again) but no alligators. I don't know of any saltwater moats, but they probably have nothing bigger than a goby. If the case is that you are considering swimming in a moat, do not hesitate. But watch out for boats.
Actually, sharks undoubtedly evolved from prehistoric sea-based creatures that were predators and had sharp teeth. Just as we know about dinosaurs, there is also fossil evidence that shows the existence of these sea creatures, about 200 million years ago. Gradually, these creatures evolved into what we know today as the various kinds of sharks. But it is unlikely we will know where the very first one of these creatures came from or where it lived.
They just know......
It's always different, but most sharks usually have hundreds of either tiny or huge teeth. *Fun Fact* Did you know sharks have rows of teeth, so when they loose one, another one moves back in it's place, usually bigger than the old one!
No such thing as Prehistoric art. They communicated by drawing on rocks. They built things as altars. But since we know about it, it's not prehistoric, it's historic.
The evidence found along with the body.
scissor sharks are extinct and the answer is not this ( because, i dont know)
The prehistoric past of the Philippines is researched in a similar manner to the prehistoric record of other countries. Archaeological digs uncovers artifacts and remains of prehistoric civilizations, revealing new details about their lives and practices.
To me and people who find sharks interesting yes, to you I don't know
yes they are called moon sharks the are like hammerhead sharks bigger they wont do much to you they will probably just give you a bite and leave you with life threatening damage ARE YOU CLEAR NOW . GOT IT.
I don't know nn