Scientists discover an ocean 400 miles beneath our feet been discussed before and this theory has some weight. We know only what they tell us, all the data that they want to hide will be erased. Because if the truth comes out, all those science theories that they have lied to us will be exposed, there will be a revolution as the belief in God will be shaken and as a result these people will be powerless.
That is why they tell us these lies in order for them to stay in power and do whatever they want from us. We are just lab rats for them. If the earth does not have molten metal core, instead, has water more than 3 times on earth then it is possible than there is a civilisation inhabiting the inner core.