Earth radiometric dating

The expansion of the universe gives an age for the universe as a whole: 13.7 billion years old.Astronomers and geologists have determined that the universe and Earth are billions of years old.The oldest reliably dated rock formation is in Greenland, where several different isotopes were used to find an age of 3.6 billion years.To find older rocks that haven’t been eroded, we need to look beyond Earth.

bathroom-blowjob

bathroom-blowjob

For example, the last 200 rings in the dead tree might match up with 200 rings early in the life of the living tree, so the two trees together can count back many years.

These methods are largely independent of each other, based on separate observations and arguments, yet all point to a history much longer than 10,000 years.

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