Elongated Skulls Could be Proof of Alien Life Here!

Columbia University released a study a several years back about the flaws in using the carbon 14 isotopes to determine age. One issue was contamination and another was that geographic regions can some sometimes alter the decay rate of the carbon 14 isotope. So do we believe science when they even admit there is flaws in the system they're using?
Even with a 50 percent error rate, Billions of years old still!!!!! No way the error rate is 50 percent.