Refining The Earth’s Clock – Science Daily March 29

It seems that this week I have been thinking a lot about the past, and events that make, break or simply change what we perceive to be the truth and how we prepare for the future.

On March 29 this year it was reported in Science Daily that “Scientists Refine Earth’s Clock: Some Events in Planet’s History Happened More Recently Than Previously Thought

New research has revealed that some events in Earth’s history happened more recently than previously thought. Scientists from the British Geological Survey and the Massachusetts Institute of Technology, publishing recently in the journal Science, have refined the data used to determine how much time has passed since a mineral or rock was formed. They report uranium isotopic composition of minerals, used to date major geological events, which are more accurate than previously published. The major effect of this is to reduce previous age determinations by up to 700,000 years.

A major effect of this work will be to decrease all previous uranium-lead (U-Pb) age determinations, by up to 700,000 years for samples that are about 4.5 billion years old — the age of Earth. In particular, the new 238U/235U ratio will allow geologists to place more accurate limits on the exact timing of a broad range of geological processes, from the initial formation of our planet, continents and economic mineral deposits, to past evolutionary events and climate change.

There are so many things in this world that change our perspectives, that tell us what has been and indicate what is to be, yet at the same time, what if what we perceive to be the truth has been miscalculated…  Does that really have an effect on what the future holds?  Or does it simply help us to understand the rates of evolutionary change, and make us better prepared for our earths future?

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About Cheryl Schull

t is our past experiences and emotions that make us who we are. The experiences we live through; the sadness we suffer, the hurt we endure, the happiness we feel, and the love we come to know creates us, moulds our souls. Without our past we cannot learn and we cannot appreciate all that this life and the people in it have to offer us. It has taken me a long time to realise that while the past has made we who I am, it is not what I am. My past sadness and heart ache has made me grateful and compassionate, it has made me appreciate everything that I have now, and taught me that while the future is untold, the story can be filled with happiness, love and hope – so long as you choose to write the story that way… I know that here is a story inside us all, we just have to be willing to share it – and this is why I am inspired daily by the people who surround me – I find hope in others experiences and life stories. I find encouragement through those willing to share their skills and I know that I am a better person for having open ears, an open heart, and an open mind to all the possibilities that this world has to offer. Because sometimes, hope knows the sun has risen even when the clouds cover every ray of light….

Posted on April 4, 2012, in Environment, Geology, History, Future & Society. Bookmark the permalink. Leave a comment.

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