This is an informational tour in which students gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.
Scientist Olivia Judson provides this good example of what happens to an adult male gorilla in the tropical rainforests of the Congo; "An adult male gorilla— all 330 pounds of him—will be reduced to a pile of bones and hair within 10 days of his death.
C) dating usually want to know about the radiometric dating methods that are claimed to give millions and billions of years—carbon dating can only give thousands of years.
But now, carbon dioxide emissions from burning fossil fuels are rapidly altering the atmospheric radiocarbon content.
And according to findings published in Proceedings of the National Academy of Sciences this week, it might become impossible to tell new things from centuries-old things. Carbon-14 is a naturally occurring, radioactive form of carbon, and it decays over thousands of years.
Composed of layers of sediments laid down by colonies of cyanobacteria, stromatolites still exist, but are quite rare today.
Early artifact: Bayeux tapestry of Norman invasion of England.