Wasn’t your question about Dinosaurs SnakePorn? Not ‘fossils, full skeletons’ However, since you ask if humankind can send a man to the moon, rockets to mars and satellites into outer space do you think it’s remotely possible that huge skeletons or fossils would be hard for mankind to design? Just a question?
Possible to make something that looks like a fossil, yes. It's been done before. But possible to make something also mimics the expected results of a range of tests, including tests not yet invented at the time of making the fake..... amazingly incredibly unlikely.