Carbon dating for children
This time varies from few-millionths of a second to millions of years for different radioactive isotopes.Geologists often need to know the age of material that they find.
One important research endeavor involves determining the precise age of biological material generated in the past 60 years by measuring the ratio of radiocarbon (or carbon-14) to the carbon-12 and carbon-13 in samples.
They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years.
This is different to relative dating, which only puts geological events in time Most absolute dates for rocks are obtained with radiometric methods.
Many strange archaeological discoveries have been made in modern history.
Hundreds of artifacts have been unearthed that have baffled scientists and challenged modern man’s view of history.ELI5: if a lightyear is the distance light travels in one year, how do we know something is 1000 light years away?