21st Century Innovative Technologies and Developments as also discoveries

A ses origines, la Terre ne présentait pas vraiment de condition favorable à l'apparition de la vie. De nouveaux travaux étayent la théorie selon laquelle la vie sur Terre...

 

En revanche, des conditions plus extrêmes (485.000 - 610.000 bar, 3500 - 4500°C) entrainent la synthèse de méthane et de formaldéhyde, ainsi que des molécules carbonées à longue chaine.

Ces composants sont des précurseurs des acides aminés et des composés organiques complexes. Des simulations de chocs thermodynamiques en laboratoire ont produit des quantités significatives de nouveaux composés carbonés azotés "prébiotiques" c'est-à-dire précurseurs de la vie.

"Lors de leur impact, les comètes peuvent synthétiser des molécules prébiotiques sans nécessiter de conditions spéciales telles que des radiations ultraviolettes, des catalyseurs, ou de conditions préalables.

===> Ces donnéessont cruciales pour la compréhension du rôle des impacts cosmiques dans la formation des composés élémentaires de la vie sur Terre mais aussi sur d'autres planètes." <===

Researchers believe it is possible to create a quantum invisibility cloak. Anything hidden in it would be shielded from reality on a quantum level.

Researchers are designing tiny particles to act as medicine.

 

The particles are coated with waterlike molecules that allow them to travel inside the body without being detected by the immune system, Farokhzad said. Their surfaces contain molecules that provide them with a "GPS" to seek out abnormal cancer cells.

 

Once they find a cancer cell, the particles stick, and like a Trojan horse, the cancer cells take them inside where they can release medicine that's toxic to the cell, Farokhzad said. [Watch the World Science Festival Live.]

 

In a study published last year in Science Translational Medicine, Farokhzad and colleagues showed that, in people, the nanoparticles delivered a much higher dose of medicine to cancer cells than to other cells in the body. Follow-up studies will test the effectiveness of the drug at treating tumors.

 

NASA has confirmed that Curiosity as found rocks which once served as a stream bed for flowing Martian water.

Though universities are rushing to embrace online courses, true education requires one mind engaging with another.

 

Educators are coaches, personal trainers in intellectual fitness. The value we add to the media extravaganza is like the value the trainer adds to the gym or the coach adds to the equipment. We provide individualized instruction in how to evaluate and make use of information and ideas, teaching people how to think for themselves.

 

Just as coaching requires individual attention, education, at its core, requires one mind engaging with another, in real time: listening, understanding, correcting, modeling, suggesting, prodding, denying, affirming, and critiquing thoughts and their expression.

 

Les scientifiques espèrent développer un seul et unique vaccin qui immuniserait contre toutes les formes de grippe. Ils pourraient s’inspirer d’une nanoparticule, formée de deux types de protéines et...

Search is on for signs of microbial activity isolated in Earth's crust.

 

15 May 2013

Water filtering out of the floor of a deep Ontario mine has been trapped underground for more than a billion years. It bubbles with gasses carrying nutrients that could sustain microbial life.

 

Scientists working  2.4 kilometres below Earth's surface in a Canadian mine have tapped a source of water that has remained isolated for at least a billion years. The researchers say they do not yet know whether anything has been living in it all this time, but the water contains high levels of methane and hydrogen — the right stuff to support life.

 

Micrometre-scale pockets in minerals billions of years old can hold water that was trapped during the minerals’ formation. But no source of free-flowing water passing through interconnected cracks or pores in Earth’s crust has previously been shown to have stayed isolated for more than tens of millions of years.

 

“We were expecting these fluids to be possibly tens, perhaps even hundreds of millions of years of age,” says Chris Ballentine, a geochemist at the University of Manchester, UK. He and his team carefully captured water flowing through fractures in the 2.7-billion-year-old sulphide deposits in a copper and zinc mine near Timmins, Ontario, ensuring that the water did not come into contact with mine air.

 

NASA scientists recorded the biggest explosion from a meteorite impact on the moon that they have seen in eight years of monitoring.

Une équipe de chercheurs de l'université de Camerino (Italie), coordonnée par Andrea Perali et David Neilson, a réussi à prédire l'existence de la superfluidité à haute...

The purification device can remove bacteria, viruses and other contaminants from water.

 

A water purification system that uses nanotechnology to remove bacteria, viruses and other contaminants may be able to deliver clean drinking water to rural communities for less than $3 a year per family, according to a new study.

Wissenschaftler des Luxembourg Centre for Systems Biomedicine haben herausgefunden, dass Immunzellen im Gehirn eine Substanz herstellen können, die Bakterien am Wachstum hindert. Dies sei ein bahnbrechendes Ergebnis.

Der Chip-Hersteller Intel hat auf der Computermesse Computex den ersten Speicherstick vorgestellt, der nicht auf USB als Anschluss setzt, sondern über den Thunderbolt-Port die Daten mit dem Rechner austauscht.

(Phys.org) —Researchers designing adult bipedal robots have faced a challenge in limitations in a robot's walking pattern. They seek ways to improve on designs to have robots move more naturally.

Imagine having an illuminated keypad projected onto your hand which stays in place even as you move, and tingles gently when you press a button

Le site de Lufeng, découvert dans la province du Yunnan en Chine contient environ deux cent os fossilisés représentant vraisemblablement une vingtaine d'embryons de Lufengosaurus,...

Aus Zement wird ein metallisches Glas: US-Wissenschaftler haben ein Verfahren entwickelt, um Zement in einen Halbleiter zu verwandeln. Das Verfahren könnte künftig in der Elektronikherstellung

(Phys.org) —NASA's Mars rover Curiosity has used the drill on its robotic arm to collect a powdered sample from the interior of a rock called 'Cumberland.'

Des chercheurs britanniques et canadiens ont découvert une poche d'eau dans les profondeurs de la mine de Timmins de l'Ontario, au Canada. D'après un communiqué de l'Université de...

What if you could print your own solar panels?

 

The researchers at Australia's Victorian Organic Solar Cell Consortium (VICOSC) — a collaboration between the Commonwealth Scientific and Industrial Research Organisation (CSIRO), the University of Melbourne, Monash University and industry partners — have managed to print photovoltaic cells the size of an A3 sheet of paper.

US team identifies mechanism deep in brains of mice that can be tweaked to shorten or lengthen lives