Carbon dating cannot prove the earth is millions of years old.

Carbon dating is just one of several radiometric dating methods that scientists use to tell the age of rocks and other materials. Other methods include uranium/lead, potassium/argon, and rubidium/strontium.

All dating methods rely on the principle that a parent element decays into a daughter element, for example, uranium to lead. Scientists know the rate of decay so they use that to estimate age. But there are several factors that make radiometric dating unreliable.

One is that the rate of decay may not have been constant in the past. Another, that there may have been some of the daughter element present when the parent element was formed. A third, groundwater could have removed some of the parent element since it was formed.

The bottom line is that dates are not reliable. Consider these examples:

Scientists using the potassium/argon method have dated volcanic rocks that are known to have been created in 1801 by a volcano in Hawaii, and that tested to be from 160 million to 3 billion years old!

Rocks formed by the Mount St. Helens volcano in 1980 tested to be millions of years old!

For whatever reason, you cannot trust dating methods.

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