Remember that half life is the time it takes for half of the unstable 12 year olds holding 14 books (Carbon 14) to drop books and become stable.
Because the animal can no longer intake Carbon this can be used to help determine the age of the fossil we are looking at.
The Carbon is in set ratios in the air, so he breathes in all forms of Carbon (12, 13, & 14). The set ratios inside the lion will change as unstable Carbon 14 begins to break down.
We can get a general age range of when the dinosaurs walked the earth by checking multiple dinosaur fossils.
Next week we will continue our exploration into Nuclear Reactions looking at how this same break down of unstable atoms has been used to improve peoples lives in medicine.
How do we know the age of dinosaurs or continents is apart of our current Featured Series on Nuclear Reactions where we explore where nuclear reactions are happening, why, and some of their uses.