Radiometric dating game
Still others, like amino acid racemization, show promise but have not yet taken wing.Now, nearly 100 years after Boltwood's groundbreaking work, it is estimated that Earth formed at least twice as long ago as he had claimed.
Argon dating can also be used to date materials as young as 10,000 years and as old as billions of years.
ANCIENT ARTWORK, such as this Chinese horse, can be evaluated using thermoluminescence.
The dating confirmed that the horse does indeed date back 1,000 years to the Tang dynasty, as its style suggests.
The following summaries offer a quick introduction to some of the dating techniques researchers have been using to explore and reconstruct our planet's past, from 4.5 billion years ago to the present.
Kate Wong RADIOACTIVE ISOTOPES The premise behind techniques involving the use of radioactive isotopes is straightforward.