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Actually the earth is roughly 4.5 billion years old.

It was determined using several different dating methods, including uranium-lead radioactivity dating, zircon dating, etc.

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Q: How did they figure out that the earth is 4 billion years old?
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Related questions

How old does scientific evidence suggest the Earth is?

== == The age of the Earth is roughly 4.6 billion years.


How old it the Earth?

In science class I learned that earth is approximately 4.6 billion years old.


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Is the world 4 billion years old or 12 billion?

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What 4.6 billion years is to the earth?

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How old is Earth?

The Earth is at least 4.4 billion years old.


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What happened to the earth 700 billion years ago?

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