The man's body was recovered and pieces of tissue were studied for their C content by accelerator mass spectroscopy.
Many isotopes have been studied, probing a wide range of time scales.
What methods do they use and how do these methods work?
In this article, we will examine the methods by which scientists use radioactivity to determine the age of objects, most notably carbon-14 dating.
A child mummy is found high in the Andes and the archaeologist says the child lived more than 2,000 years ago.
How do scientists know how old an object or human remains are?