A photo of the 4.4 billion-year old zircon. John Valley / University of Wisconsin-Madison This tiny piece of early Earth, a piece of the mineral zircon, dates to 4.374 billion years ago. In the scheme ...
A zircon gem found on an Australian sheep farm is thought to be the oldest piece of earth ever found. Photo / Thinkstock A gem found on a sheep ranch in Australia has been found to have formed 4.4 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback