[RedDevil]

Originally Posted by jamesqf

Please back up a second, and explain exactly how having VERY slight differences in the ratio of an isotope which occurs naturally in the atmosphere (and always has - ever hear of carbon dating) could reasonably be described having an impact. It's only detectable because we have equipment that can measure down to fractions of a part per trillion, fer gawdsakes.

Original paper here: PLOS ONE: Vertebral Bomb Radiocarbon Suggests Extreme Longevity in White Sharks

Some info about carbon-14: Carbon-14 - Wikipedia, the free encyclopedia

It weighs them down, as C14 is heavier that C12. Sharks are heavier than their environment anyway and need to swim to stay afloat. This just makes it 0.000000000000001 % harder on them.
But it is very unlikely that the minute amount of C14 is causing them to have health issues, that was not what I meant by 'having an effect'. The radiation it causes would be completely indistinguishable.