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What are you researching now? In Greenland, Ed is studying some of the oldest rocks on the Earth.
In Greenland, Ed is studying some of the oldest rocks on the Earth.
   
Chuck Said
Lately, I've been studying very old rocks in Greenland.

The Earth is old, about 4.5 billion years old. There are rocks in Greenland that are 3.8 billion years old. These are some of the oldest rocks on the Earth.

I'm hoping that these rocks will give me clues about whether or not life existed at that time. It's tricky because the rocks are in a completely different form from what they once were. They were buried in the Earth and heated several times in the past, which changed their form. But because these rocks are so old, they hold unique stories about the past.