Scientists would answer that there have been innumerable measurements of dates and that there is consistency among these dates, particularly from different radioactive dating
Gnos' team determined the meteorite's age by radioactive dating
. The group describes the turbulent history of the meteorite, dubbed Sayh al Uhaymir (SaU) 169, in the July 30 Science.
In an effort to end the debate, he and his colleagues used two radioactive dating
techniques on small mineral grains called zircons that they harvested from the sandstone.
of minerals in the clinker outcrops suggests that some of the region's coal fires occurred as many as 2.8 million years ago.
shows that those gems formed about 2.9 billion years ago, says Mark H.
of the melts and the hydrothermal deposits indicates the Sudbury impact occurred about 1.85 billion years ago.
shows that the mites were entombed roughly between 3,200 and 800 years ago, Polyak notes.
Astronomers have determined the age of many stars using radioactive dating
. A radioactive element's half-life is the time it takes for half of its atoms to decay into lighter so-called daughter elements.