The results showed that Ötzi died over 5000 years ago, sometime between 33 BC.
Uranium has a very long half-life and so by measuring how much uranium is left in a rock its approximate age can be worked out.
The internet is populated with many fake and scam sites - with many being created daily purely to look genuine.
When checking we looked at many factors, such as the ownership details, location, popularity and other sites relating to reviews, threats, phishing etc.
Although a site like may have a high trust rating, it's worth just checking the countries involved as these could indicate that goods would be shipped from abroad rather than your home country.
Well, a simple explanation is that it is the time required for a quantity to fall to half of its starting value.
Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson.
For example, in 1991, two hikers discovered a mummified man, preserved for centuries in the ice on an alpine mountain.