Biologists have their principles of evolution, physicists have their laws of thermodynamics and chemists have their periodic table. For geologists, perhaps the most hallowed reference source is the ...

Reston, VA – The U.S. Geological Survey (USGS) and the Association of American State Geologists (AASG) announced that they have developed an updated geologic time scale and color scheme for use in ...

What are some events that all of us have had in our lives? Ask the class "What are some events that all of us have had in our lives?" Make a list of 5 or 6 things on the board. Let’s organize these!

Our planet is more than four billion years old – a staggering amount of time for humans to contemplate. To ease this task, experts have divided earth’s history into pieces of time, called aeons, eras, ...

Time -- or at least how we think of time -- can be complicated and very different depending on how you use it. The way Earth scientists can be very odd when seen from the outside. It is common to hear ...

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Scientists have identified the ...

Ever since atmospheric chemist Paul Crutzen (Nobel Prize winner in 1995) popularized the notion of the Anthropocene at the turn of the millennium, the use of the word has spread throughout society. So ...