See more » They use Carbon dating to establish the age of the sand at 5.5 Billion years. ) we have an episode where the entire arc of the series becomes secondary to the humanistic issues of the characters. This was then picked up by the TV writers in the 1950s.
However Carbon dating is only useful up to about 50,000 years (because the relevant Isotope has a half-life of only about 6,000 years.) There's no way they could have established the sand's age with using carbon dating, even assuming that it contains any carbon at all. If this reviewer had a dime for every time Lassie rescued someone from a drainage ditch -- well, you get the picture.
It occurs in more different forms than any other element in the periodic table.
The thing that makes this decay process so valuable for determining the age of an object is that each radioactive isotope decays at its own fixed rate, which is expressed in terms of its half-life.
So even we humans are radioactive because of trace amounts of radiocarbon in our bodies.
After radiocarbon forms, the nuclei of the carbon-14 atoms are unstable, so over time they progressively decay back to nuclei of stable nitrogen-14.3 A neutron breaks down to a proton and an electron, and the electron is ejected. The ejected electrons are called beta particles and make up what is called beta radiation. Different carbon-14 atoms revert to nitrogen-14 at different times, which explains why radioactive decay is considered a random process.
Offices need more than one copy of a document in a number of situations.
Typically they need a copy of outgoing correspondence for their records.
However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.