Archives de catégorie : sciences-general

On Science and Nonscience

by Neil Lock, January 11, 2018 in WUWT


What is science?

According to Webster’s, science is: “knowledge or a system of knowledge covering general truths or the operation of general laws.”

The way I see it, science is a method of discovering truths. For the idea to make any sense at all, though, we need first to agree that scientific truth is objective. Now, a particular truth or fact may of course be unknown, or poorly understood, or wrongly apprehended, at a particular time. But in science, one man’s truth must be the same as another’s. (…)

Carbon isotopes, Part 2 : The Delta Notation

by David Kirtley, December 28, 2017, in SkepticalScicence


In Part 1, we learned about carbon isotopes: how 14C forms in the atmosphere, how different isotopes move through the Carbon Cycle, and how isotopic measurements reveal clues about our changing climate. In this post we will look at how measurements of changing isotopic ratios are described.

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Check out this NOAA link for more. And if you have more time check out the entire series on isotopes. I can’t recommend it enough!

Contamination of the Arctic reflected in microbial metagenomes from the Greenland ice sheet

by A.L. Hauptmann et al., July 11, 2017


Globally emitted contaminants accumulate in the Arctic and are stored in the frozen environments of the cryosphere. The microbial potential to degrade anthropogenic contaminants, such as toxic and persistent polychlorinated biphenyls, was found to be spatially variable and not limited to regions close to human activities.

Why there are so many species of tropical trees and other organisms

by Washington University in St-Louis, June 29, 2017 in ScienceDaily


If aliens sent an exploratory mission to Earth, one of the first things they’d notice — after the fluffy white clouds and blue oceans of our water world — would be the way vegetation grades from exuberance at the equator through moderation at mid-latitudes toward monotony at higher ones. We all learn about this biodiversity gradient in school, but why does it exist?

Le sol, un héritage méprisé

par Ales Bartos, 16 février 2017


Étant très marginalisées sur le champ médiatique, les problématiques liées aux sols échappent largement à l'attention du public. Pourtant, la pollution et l'érosion des sols fait annuellement baisser la capacité des sols de produire des aliments en qualité et quantité suffisantes pour nourrir une population mondiale croissante. Cet article tente d'ouvrir des pistes vers une meilleure gestion des sols, physique et réglementaire, s'inscrivant dans les logiques du développement durable.
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