Wow ok.... thanks for that.
So how are you sure these fossils aren't faked/minterpretted?
It would depend, firstly a "fossil" is prity non descriptive.
Fossil - A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded and preserved in the earth's crust.
A fly may become fossilised in tree sap and survive a million years or so in pristine condition, fossils also can become deep frozen in the antarctic. relatively young fossils may in the right circumstances fossilise for thousands of years.
Fossils are very rare indeed, this considered you need to bear in mind that 90% of species now extinct have left no trace of thier existence so we will never know what other species have once lived. Further, thier ain't that many people actually looking for them!!!!
"Most" fossils though do not have any biological matter at all, and what once was bone is now hard rock that has the bone shape and texture inprinted onto the stone, dating the rock and the rock around the fossil is how the age of the fossil is determined. The same process of rock being inprinted is also found with leaves etc etc.
Like anything of value, fossil finds can make you rich and similar to the art world fossils have been known to be faked. For fossils of scientific interest, science does now go to extreme lengths to determine the validity of new fossil finds before publishing any work.
Hope this helps..........