How old is our planet Earth? When did the dinosaurs live? When were ancient monuments built? It is a proven fact that the oldest rock ever found on Earth is as old as 4.375 ± 0.006 Ga (Giga annum or Billion years) old. How did the scientists calculate this age? The answer to the above questions is dating!
One of the oldest and most reliable dating methods is the Uranium-Lead (U-Pb) dating. Uranium–Lead dating is a geological age-determination method that uses the radioactive decay of the unstable Uranium (U) (238U and 235U) into stable isotopes of Lead (Pb) (206Pb and 207Pb respectively).
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