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Asked by to Ekbal on 15 Jun 2014. This question was also asked by .
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Ekbal Hussain answered on 15 Jun 2014:
Hi!
That’s an interesting question and it took people a long time to find the right answer. We can measure how old the Earth is by dating special kinds of very old rocks. Inside these rocks there are crystals called zircon. We can use these crystals to tell how the old the rock is by measuring how much energy the crystal has lost over time.
The oldest rocks we have found are from Australia and tell us that the Earth is around four and a half billion years old.
That’s 4500,000,000 years old! Or 4500 million years old. That’s pretty old, huh?
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Comments
Ekbal commented on :
My traveling companion Wally the whoolly rhino (see photo at the bottom of my profile), says that even some of his friends older than 1 million years!
Whoolly rhinos were around on the Earth from about 2 and a half million years ago. But sadly they all (apart from Wally of course) died out about 12 thousand years ago 🙁
finlaye commented on :
because u count
magicalunicorn123 commented on :
i like