The Oldest Footprints of the Dinosaur Lineage - Quarter-Billion Year Old Dinosaur Footprints Are Oldest Ever Found

Cue the SixThousandYearOldEarth-tards in 5...4...3...

Silly OP, the GLP religitards do not believe in dinos.

And on that note...

Changing constants? Decay rates of carbon 12 in question?

Carbon dating not to be trusted?!

Lol

Plastic? [link to www.istockphoto.com]

Lol! That is one reason I posted this. Carbon dating gets sketchier by the month. Question everything...even the constants

for night

Bump For other night.

OTOC, hope all is well with you. It can be a fucking rough road sometime.

Can indeed be, but all is good for the time that is passing from which I see.

the half-life of a radioactive isotope changes in the presence of a changing electric field.
given the massive electrical interactions that are presumed to have occurred between the earth and other planets within the last 10,000 years, radiometric dating can't be relied upon for dates earlier than the most recent interaction.

one of the assumptions behind cabon dating is that the amount of carbon in the atmosphere has remained roughly constant over the earth's history
however core samples from some of the oldest trees in the world (4000 year old redwoods!) have shown that there were several massive fluctuations in atmospheric carbon levels in the first thousand or so years of those trees' lives
when a tree develops a new ring, the atmospheric carbon present in the previous ring is locked into that ring
you can see how much carbon was in the atmosphere in a certain year in that part of the world by cutting into a tree and analysing the amount of carbon in the relevant ring

two scientific reasons why radiometric dating (and carbon dating in particular) are unreliable beyond about 700 BC

the rate of decay of an isotope is proportional to the speed of light, which is slowing down the measurements of the speed of light over the last few hundred years can be mapped to a cosecant-squared curve (which looks roughly like a right angle)
following the curve back would indicate that the speed of light was many orders of magnitude faster several thousand years ago