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Human Health Depends on a Healthy Environment

What is the value of an intact rainforest ? From a people perspective, maybe it's more useful turned into lumber and cropland. [More] -- Read more on ScientificAmerican.com

A-t-on vraiment besoin du chromosome Y ?

dimanche 24 novembre 2013 par Pierre Barthélémy — Biologie, Génétique, Chromosome Y, Gènes, Infertilité, Sexe, Spermatozoïdes, Testicules
Chez l'humain, le sexe est déterminé par deux chromosomes, le X et le Y. Une paire de X donne une fille, un X et Y un garçon. Mais, alors que le X est porteur de plusieurs centaines de gènes utiles … Continuer la lecture →

Sunday Species Snapshot: Rothschild's Giraffe

dimanche 24 novembre 2013 — Energy & Sustainability,More Science,Evolution
Fewer than 700 of these endangered giraffes remain in the wild. Species name: Rothschild’s giraffe, a.k.a. the Baringo or Ugandan giraffe ( Giraffa camelopardalis rothschildi ), one as many... -- Read more on ScientificAmerican.com

Geologizing with Doctor Who

samedi 23 novembre 2013 — Evolution,More Science,Space,Technology
November 23, 1963 the first episode of the British science-fiction television programme “ Doctor Who* ” was broadcast. The series follows the adventures of the “ Doctor “,... -- Read more on ScientificAmerican.com

The amazing Hook Island sea monster photos, revisited

samedi 23 novembre 2013 — Evolution
Robert Le Serrec's Hook Island sea monster, supposedly photographed December 12th 1964. Long-time readers of Tet Zoo might remember Sea Monster Week: a series of articles I ran at Tet Zoo ver 2... -- Read more on ScientificAmerican.com

The House that Fitz Built: A Scandal Explanation of the Polygyny Threshold Hypothesis

samedi 23 novembre 2013 — Evolution,More Science
I don’t watch Scandal but I have a pretty good idea of the major plot lines and characters. Thanks to the awesomeness that is Social Media and #BlackTwitter , I have a close captioning... -- Read more on ScientificAmerican.com

Newly Discovered Super Dinosaur Rivals T-Rex!

This week’s video comes to us from Rob Nelson at Untamed Science . According to Rob: Siats (pronounced SEE-OTTS) is a giant mega-predator (think T-Rex, but living at a different time). I... -- Read more on ScientificAmerican.com

Khalil's Picks (22 November 2013)

Another week, more great stuff. We have a great selection today which will make your weekend really really good. Dig in! [More] -- Read more on ScientificAmerican.com

We Need Leaders Who Share John F. Kennedy's Vision of World Peace

vendredi 22 novembre 2013 — Evolution,Health,More Science
To commemorate the 50 th anniversary of the death of President John F. Kennedy, I’m reposting a column about his “Peace Speech,” which he gave less than six months before his... -- Read more on ScientificAmerican.com

The Incredible Mr./Mrs. Limpet: The Endangered, Sex-Changing Sea Snail

vendredi 22 novembre 2013 — Energy & Sustainability,More Science,Evolution
A needle biopsy reveals the sex of a ribbed Mediterranean limpet. The reddish fluid in the syringe indicates that the limpet is a female. Photo by Iv?n Acevedo Understanding how an endangered... -- Read more on ScientificAmerican.com

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