This page contains polls dedicated to How old is our Earth?.
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The Earth is thought to be about 4,600 million years old. The oldest rocks so far discovered are up to 3,800 million years old. The Universe is much older, and probably began about 13,000 million years ago.

We can calculate the ages of the Earth and the Universe by examining meteorites, and also by looking at changes in the atomic structure of some of the elements found on the Earth.

Radioactive elements decay at a steady rate, and these changes can indicate the age of the Earth and othe read more...

Tags: earth, years, age

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