A technique for measuring the age of a material based on the spontaneous breakdown of a radioactive nucleus into a lighter nucleus.
As was pointed out in the earlier article on potassium-argon dating, Brent Dalyrmple, a leading researcher in radioactive dating
and, incidentally, a very active supporter of evolution in the debates ongoing in the US, has likened the argon that is formed in a mica mineral to that of a bird in a cage.
But, in March, Chinese scientists revealed that using a new radioactive dating
method, Peking Man may have lived 200,000 years earlier.
of the 600-meter-thick halite deposits, and of the sediments above and below them, indicates that the salty strata formed even before dinosaurs walked the Earth.
Peking Man was previously believed to have lived 400,000 to 500,000 years ago, but Chinese scientists, using a new radioactive dating
method, said this year they could have lived as far back as770,000 years ago.
of mineral crystals in that rock suggested that the collision occurred about 144 million years ago.
Firstly, they use radioactive dating
techniques to put fossils in chronological order according to the age of the rocks in which they are found.
of those samples, as well as of the volcanic layer deposited directly atop them, suggests that the Dresser quartz formed between 3.49 billion and 3.46 billion years ago, says Ueno.