Science & Technology

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Backers of the internet have long pushed its environmental benefits. And it’s true that the Net has allowed us to use less energy by dematerializing many essential activities. For example, downloading an MP3 rather than buying a CD produces a lifecycle CO2 saving of 40% to 80%.However, recently campaigners have been sounding the alarm about the cloud-related expansion of data centers around the country, with some well-known companies accused of using less-than-clean energy sources to power them.This infographic by Wordstream…
With a huge computational effort, NASA has visualized thousands of ocean currents on the earth. Videos show the interaction of water masses while vortices are largely based on actual measurement data.Never before have we seen the noise of the seas like this: The Gulf Stream, circulating water masses along the Canary Islands or the Kuroshio current in Japan - for the first time a visualization shows the surface currents of the oceans of our planet. The Goddard Space Flight Center…
La fumée des incendies de forêt provoque la mort de 339 000 personnes par an selon les chercheursChiffre impréssionant.. auquel on pense rarement...Cliquez sur le lien pour lire l'articleSource: Le monde
Solar panels provide heat and electricity for homes in rural Botswana. (Photo: UNDP)Highlights•The UNDP-supported Rural Electrification Programme is providing villages in Botswana with clean, sustainable energy access. •Excluding South Africa and Egypt, only 20 percent of Africans have electricity.•The programme aims to equip 65,000 households with solar powered photovoltaic, rather than paraffin, lighting by 2011.Until recently, the Mokgatlhe family in Kgope, a remote village situated 50 kilometres west of Botswana’s capital, had been using firewood to light and heat their…
La naissance d'une étoile massive, une énigme cosmique.Pour son premier anniversaire, le télescope Herschel de l'Agence spatiale européenne (ESA) vient d'offrir aux astronomes de fascinantes images. Elles montrent la naissance d'une toute jeune étoile massive, un corps céleste dont la formation défie les théories actuelles. "Une découverte sensationnelle, très excitante", s'enthousiasme Annie Zavagno, du Laboratoire d'astrophysique de Marseille.Lancé le 14 mai 2009 - en même temps que le satellite Planck dédié à l'étude du rayonnement fossile émis juste après le…
What would the 1980s have been without big hair and ice-cold wine coolers?Luckily no one had to find out: Key substitutions in hairsprays and refrigerants allowed such products to exist without chlorofluorocarbons (CFCs), which were found to be ripping a huge "hole" in Earth's protective ozone layer.Today the ozone hole, which was first spotted 25 years ago, appears headed for a happy ending, thanks to unprecedented international action.Could a similar effort rein in climate change? And is the closing ozone…
Dolphins have been filmed playing an impromptu game of football... using a jellyfish as an improvised ball. A team of marine biologists were astonished to see a dolphin swim under a jellyfish and with a quick flick of its tail shoot it out of the water.
Sometimes a picture really is worth a thousand words, particularly when the picture is used to illustrate science. Technology is giving us better pictures every day, and one of them is helping a NASA-funded scientist and her team to explain the behavior of a greenhouse gas. Google Earth -- the digital globe on which computer users can fly around the planet and zoom in on key features -- is attracting attention in scientific communities and aiding public communication about carbon…
For those of you with the latest iPod or iPhone Touch, in a months time you’ll be able to charge your Apple gadgets with a fancy schmancy new solar case. Novothink, a manufacturer of alternative electronic devices, has just released their Solar Surge for the iPod and iPhone Touch. Your igadget slides easily into the hard case solar charger and can get fully juiced up from the sun! With something this handy and easy, you’ll never have to worry about a…
The next frontier in green transportation is bound to be flight travel, which is why it is not surprising to see that NASA just announced the Green Flight Challenge. The competition will be awarding a prize of $1.5 million to the first plane to achieve 100 miles per hour, for 200 miles. That may not sound that impressive until you realize that the plane must achieve an efficiency of 200 passenger miles per gallon - not an easy feat! The…

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