A paleontologist friend of mine often quips that in his field, everything from the 1950s onward is considered “present date”, because the additional radiation pretty much ruined any chance of accurate carbon dating after the atmospheric testing era.

Granted, paleontology looks back in the span of millions to billions of years, so those ancient fossils are ok, but I imagine future scientists will grind their teeth an awful lot when trying to make scientific sense of our present day.