Chronique d'un pays où il ne se passe rien... ou presque !
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Chronique d'un pays où il ne se passe rien... ou presque !
« Je ne cherche pas à connaître les réponses, je cherche à comprendre les questions. »
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Rescooped by Daniel Denninger from Geography Education
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It's official: a global mass extinction is under way

It's official: a global mass extinction is under way | Chronique d'un pays où il ne se passe rien... ou presque ! | Scoop.it

"New research confirms that the next mass extinction is in progress, and we’re the cause. There’s been little doubt that humans have been severely altering the planet and reducing biodiversity, but it has been unclear how many species go extinct under normal circumstances, without human influence.

This new research clarifies the rate of 'background extinction' (the rate of extinction during the point before humans became a primary contributor to extinction). The research confirms that human activity is driving species extinct at a rate far higher than the background rate. A look at previous events suggests cause for concern. Geologists recognize five previous mass extinction events— the end of the Ordovician, Devonian, Permian, Triassic, and Cretaceous periods, meaning that we’re now in the 6th."

 

Tags: physical, biogeography, environment, ecology, environment modify, sustainability, geology.


Via Seth Dixon
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Ivan Ius's curator insight, February 28, 7:03 PM

Geographic Thinking Concepts: Patterns and Trends; Interrelationships;

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The world's oldest living tree

The world's oldest living tree | Chronique d'un pays où il ne se passe rien... ou presque ! | Scoop.it
At 4,841 years old, this ancient bristlecone pine is the oldest known non-clonal organism on Earth. Located in the White Mountains of California, in Inyo National Forest, Methuselah's exact location is kept a close secret in order to protect it from the public. (An older specimen named Prometheus, which was about 4,900 years old, was cut down by a researcher in 1964 with the U.S. Forest Service's permission.) Today you can visit the grove where Methuselah hides, but you'll have to guess at which tree it is. Could this one be it?

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Seth Dixon's curator insight, January 31, 2014 2:44 PM

I freely admit that I have a strange fascination with the twists and turns in a majestic tree; I find that they are great reminders of the wonders and beauty to be found on Earth. 


Tags: biogeography, environmentecology, historical, California.

Beatrice Do's curator insight, January 31, 2014 3:40 PM

the exact location is kept a close secret O_O

Joseph Thacker 's curator insight, February 5, 2014 7:17 PM

After reading this article, I am pleased to know that the world oldest non-clonal organism is located in California. It is amazing that a tree could still stand after almost 5,000 years. Hopefully, people do not destroy this tree, as it is fascinating.