Scientific american carbon dating
This half-life differs dramatically from isotope to isotope.
As a result, different isotopes are better suited to dating different items.
And last week scientists announced that new dates for an extinction event that claimed most of Australia's large animals show that humans, not the climate, wiped them out.
In the decades that followed, scientists made important new discoveries about the structure and behavior of atoms, and they refined their existing dating techniques.
More recently, they have developed a number of new methods.
AMINO ACID RACEMIZATION Over time, the amino acids that make up proteins slowly convert from their so-called left-handed state to their right-handed forma phenomenon known as racemization.
When temperature and environment are constant, conversion occurs at a constant rate.
Argon dating can also be used to date materials as young as 10,000 years and as old as billions of years.