sign up (free!)
Also on these boards
Earth Evolution Poster/Graphic - Changing Planet - The Intersection of Geology and Biology - illustrates how the Earth has evolved over the past 4.6 billion years, and highlights how that evolution influences biological evolution.
Sometimes, discovering when something happened only begins to make sense when it’s seen in relation to other events. This is particularly easy to do if the total time is shown in the form of a clock. The age of the Earth is about 4.5 billion years – on the clock, 1 second equals approximately 52,000 years and one hour is 187.5 million years.
An upcoming documentary entitled The Raising of America will explore the early childhood education and care system in the U.S., including a comparison to other countries. A preview video is available on their website.
Qingsongite: New Mineral from Tibet Hard as Diamond Aug 5, 2013 by Sci-News.com The International Mineralogical Association has officially approved qingsongite as the name for a new mineral, cubic boron nitride. Qingsongite is a recently discovered mineral. Coesite and osbornite are also ultra-high pressure minerals (Larissa Dobrzhinetskaya / University of California, Riverside)