Showing posts with label Stem Cells. Show all posts
Showing posts with label Stem Cells. Show all posts

Thursday, October 25, 2012

TOP 10 TECH STORIES OF THE DECADE

10. iPod Crushes Internet Music Piracy


iPod Crushes Internet Music Piracy
This has been the decade of portable electronics: the Blackberry, the digital camera, the GPS device. But the digital music player, the iPod, has steamrolled the market and put a stranglehold on Internet piracy. It was released on Oct. 23, 2001, and by the end of 2002, Apple had sold 376,000 units.
Around the same time, online music was becoming popular, with people sharing or downloading digital music for free. In 2003, one million tracks were illegally downloaded.

But then came Apple’s iTunes Store in April 2003. It made downloading music legal and inexpensive, with royalties going to the appropriate recording companies. The only catch was that a person needed to own an iPod, since the digital music player was the only one compatible with iTunes.
By January 2009, 6 billion songs were sold on iTunes and by September, more than 220,000,000 iPods were sold worldwide, making it the best-selling digital audio player series in history.

9. YouTube Goes from 0 to 60 in a Click



In December 2005, Chad Hurley (left), Steve Chen (right) and Jawed Karim, former employees of PayPal, launched YouTube.com, a Web site for uploading and sharing video clips. Suddenly, people of all ages had a place to post homemade music videos, video blogs, home movies and, with the proliferation of the camera phone, criminals caught in the act and news events as they happened.
By the summer of 2006, people were uploading more than 65,000 new videos every day and logging more than 100 million video views per day. The term “viral video” went viral.

A year after launch, Google acquired YouTube for $1.65 billion in stock. Shortly after, Time magazine voted “You” as the Person of the Year, based in part on the success of YouTube. In 2008, YouTube hosted the CNN-YouTube presidential debates and asked YouTubers to submit questions.
The large range of topics shared on YouTube has made video an important part of our culture. As of October 2009, YouTube had more than 1 billion views per day.

8. Wi-Fi Takes to the Skies


The wireless Internet radio standard, also known as IEEE 802.11, was introduced in 1999. Within a few years, Wi-Fi hotspots were sprouting up everywhere, from coffee shops, libraries, airports and university campuses to entire cities.
In December 2001, the United States' Federal Communications Commission issued its first-ever license – to Boeing -- to operate in-flight wireless broadband data services.

Other countries quickly followed suit. By 2005, Boeing had Wi-Fi on commercial air carriers, though they were from Europe to Asia. U.S. carriers seemed reluctant. Boeing never made any money on the venture and discontinued the service at the end of 2006.
But airborne Wi-Fi didn’t die. In 2008, a handful of companies got into the in-flight Internet ring, and by the end of 2009, nine domestic airlines offered a range of Wi-Fi services. With Wireless Gigabit service just around the corner, surfing the Internet from a plane will get 10 times faster.

7. Laptops Get Smaller and Super Cheap



When in 2005 Nicholas Negroponte, then the cofounder and director of the Media Lab at the Massachusetts Institute of Technology, described his plan to develop a laptop that would cost $100, he raised a few eyebrows. At the time, the average price for a notebook computer was around $1,100.
Negroponte developed a smaller, lighter laptop -- named the XO -- suited for basic computing and accessing the Internet. The laptop relied on a simple operating system from Linux and flash memory (the same in USB memory sticks) that kept the machine power-efficient. It also came with a full-color screen, wireless capability, video and still cameras, and without any hazardous material.

Ultimately it cost $199, but One Laptop Per Child has distributed 1.2 million computers to children in 31 countries.
In 2006, Intel introduced the Classmate PC, a laptop similar to the XO, for $250.
Cheap laptops weren’t just for kids. In mid-2007, Taiwan-based Asus mass-produced the Eee PC, which retailed for under $300. In four months, it sold more than 300,000 units and immediately Dell, HP and Acer got on the bandwagon. Even in a slow economy, consumers bought about 25 million netbooks in 2009.

6. Humans Meld with Machines


Cyborgs are becoming reality. In the last decade, much progress has been made with brains controlling robotic limbs and computers.
In 2000, researchers at Duke University Medical Center implanted electrodes in monkeys’ brains and then trained them to reach for food using a robotic arm. Such a neurochip could one day restore motor function in paralyzed patients.
A team from the MIT Media Lab Europe developed a non-invasive method for picking up brain waves and, in 2004, used those signals for the first time to control the movements of a video game character.

Robotic limbs operated with nerve signals debuted in 2001 at the Rehabilitation Institute of Chicago. There, Jesse Sullivan, a double amputee, used the method to control both of his robotic arms.
And in 2009, amputee Pierpaolo Petruzziello learned to control a biomechanical hand connected to his arm nerves with just wires and electrodes. Petruzziello became the first person to make complex movements -- finger wiggling, a fist, grabbing objects -- with a robotic limb, using just his thoughts.

5. Stem Cells Found in New Sources


In 2001, President George W. Bush cut federal funding to scientists working with embryonic stem cells -- found in a tiny, hollow ball of about 70-100 human cells that could become anything in the human body -- because of ethical concerns.
Embryonic stem cells were one of the most promising medical advances in years, with the potential to cure diseases from diabetes to cancer to genetic disorders, and more.

In 2007, scientists from Kyoto University and the University of Wisconsin-Madison, working separately, essentially turned back the clock for adult skin cells, allowing these mature cells, which were preprogrammed to become skin, to act like embryonic stem cells. The adult cells became pluripotent cells, or cells that could end up being virtually any other kind of cell.
These pluripotent adult cells solved two big problems. Ethical concerns and financial restrictions could be avoided, and doctors could ultimately use cells with a person's own DNA to grow replacement organs that a patient would be less likely to reject.

4. People Take Action Via Social Networking Web Sites


When on June 12, 2009, the Iranian government announced that incumbent Mahmoud Ahmadinejad had won by a landslide, even though opinion polls had shown Mir-Hossein Mousavi with a strong lead, the Iranian people took to the streets in protest.
In response, the government jammed cell phone services, blocked access to Facebook and YouTube and cut off the BBC’s Persian-language station. But they forgot about Twitter, founded in 2006 by Jack Dorsey.

Throughout the weekend, protesters used the site to organize demonstrations and to communicate events to the rest of the world. According to Mashable, there were 10,000 to 50,000 tweets per hour mentioning Iran.
Social networking services also came into play during the 2008 presidential election in the United States. Democratic nominee Barack Obama made Chris Hughes, co-founder of Facebook, a member of his campaign team. By using Facebook, as well as YouTube, Twitter and his own personal site, my.barackobama.com, Obama raised roughly $750 million -- more than any other candidate in history.

3. Scientists Create First Synthetic Bacterium


There are those who tinker under a car’s hood, modifying existing parts, and then there are those who machine their own engine parts from scratch. Synthetic biologists are the latter.
Synthetic biologists chemically engineer DNA, amino acids and other cellular parts from the ground up.
Their efforts could lead to cells that perform new functions, including making alternative fuels, drugs for treating malaria, AIDS and cancer, and even creating new forms of life. 

In 2003, Jay Keasling of the University of California, Berkeley, and his team engineered microbes to manufacture a synthetic version of artemisinin, a chemical compound found in the sweet wormwood plant that is 90 percent effective against the parasite that causes malaria, but is expensive to extract. His efforts garnered him $43 million from the Bill and Melinda Gates Foundation to advance the research.
In 2008, a team from the J. Craig Venter Institute in Chicago created the largest man-made genetic structure, a bacterium containing 582,970 base pairs of DNA. Their next goal is to transplant a synthetic chromosome into a living cell.

2. Google Becomes a Verb


Google has taken the last decade by storm. One of the biggest stories to come out of the Mountain View, Calif.-based company was the announcement of its Initial Public Offering  in August 2004.
Just four years prior, the Internet bubble had burst and with it the dreams of IPOs and overnight wealth. But then Google went public, establishing its opening share price of $85 through an unconventional Dutch auction. The search engine company, which launched in 1998 and whose name was voted the most useful word of the year by the American Dialect Society in 2003, had put the Internet startup back on the map.

Google is also credited with overhauling email and online mapping services, building a variety of Web applications, a browser and for introducing content-targeted advertising. Today those shares are worth nearly $600 each, and Google has diversified the company even further, using its strengths in information and technology to drive philanthropy in global health, climate and energy.

1. Human Genome Mapped 


Coiled up inside every human cell sit 23 molecules that, if unwound and placed end to end, would stretch about three feet. Those molecules, known as chromosomes, contain all the instructions necessary to build an entire human being. It took more than 10 years and an international collaboration of scientists, but the year 2000 saw a rough draft of the entire human genome, followed by a completed version in 2003.
The publicly funded Human Genome Project and its private competitor, Celera Genomics, constitutes one of the largest scientific endeavors in history, one that revealed in intimate detail just what makes up a human being.

With the information from individual genome maps, scientists can uncover new clues about everything from a person's body odor to mental disease.
Since decoding the human genome, dozens of other species have had their genomes sequenced, including pigs, dogs, bees, mosquitoes, puffer fish, chimpanzees, yeast, corn, and rice. With these maps in hand, scientists can and will discover new ways to heal diseases and improve crop yields.

source: http://news.discovery.com

Wednesday, October 17, 2012

TOP 10 DISCOVERIES OF THE DECADE

10. Pluto-Sized Eris Rocks Solar System
Pluto-Sized Eris Rocks Solar System
In January 2005, Mike Brown and his team at Palomar Observatory, Calif. discovered 136199 Eris, a minor body that is 27 percent bigger than Pluto. Eris had trumped Pluto and become the 9th largest body known to orbit the sun.

In 2006, the International Astronomical Union (IAU) decided that the likelihood of finding more small rocky bodies in the outer solar system was so high that the definition "a planet" needed to be reconsidered. The end result: Pluto was reclassified as a dwarf planet. Pluto acquired a "minor planet designator" in front of its name: "134340 Pluto."


Mike Brown's 2005 discovery of Eris was the trigger that changed the face of our solar system, defining the planets and adding Pluto to a growing family of dwarf planets.


9. T. rex Tissue Dug from Bone

rex Tissue Dug from Bone

In 2005, Mary Higby Schweitzer and her colleagues reported in Science the discovery of what appeared to be soft tissues -– blood vessels, bone matrix and other cells –- inside the fossilized femur of a small T. rex.

Since then, the bones have revealed amino acids that resemble those of modern chickens, firming the link between dinosaurs and birds.

Schweitzer's discovery comes in a decade of other stunning revelations about the soft parts of dinosaurs.

In 2004, one of the few mummified dinosaurs ever found -- an amazingly well-preserved
66-million-year-old hadrosaur with intact, mostly mineralized skin -- was excavated from a ranch in North Dakota.

Then, in June 2009, researchers announced they had isolated molecules related to soft skin tissues from that hadrosaur.

8. Dark Matter's Existence Confirmed Directly


Dark Matter's Existence Confirmed Directly
In the summer of 2006, astronomers made an announcement that helped humans understand the cosmos a little better: They had direct evidence confirming the existence of dark matter -- even though they still can't say what exactly the stuff is.

The unprecedented evidence came from the careful weighing of gas and stars flung about in the head-on smash-up between two great clusters of galaxies in the Bullet Cluster.

Until then, the existence of dark matter was inferred by the fact that galaxies have only one-fifth of the visible matter needed to create the gravity that keeps them intact. So the rest must be invisible to telescopes: That unseen matter is "dark."

The observations of the Bullet Cluster, officially known as galaxy cluster 1E0657-56, did not explain what dark matter is. They did, however, give researchers hints that dark matter particles act a certain way, which future research can build on.

7. New Human Ancestors Emerge

New Human Ancestors Emerge
In 2002, researchers in northern Chad unearthed the 6- to 7-million-year-old skull of Sahelanthropus tchadensis -- known as Toumai. Only skull bones have been discovered, so it's not confirmed whether Toumai walked upright on two feet. But other Toumai remains make a stronger case that it greatly extends the human family timeline.

Then along came Ardi. In 2009, the nearly complete skeleton of  Ardipithecus ramidus, a.k.a. “Ardi,” in northeastern Ethiopia bumped the famous “Lucy” as the earliest, most complete skeleton of a human ancestor ever found.
The 4.4-million-year-old Ardi could walk on two legs, but was also a skilled tree-climber. Her teeth suggest she ate many different types of food. And scientists theorize that males and females may have paired off at this time, significantly boosting survival, since females could intensify their parenting while males provided food.

If the studies prove true, Ardi marks the closest we have come to discovering the last common ancestor of chimpanzees and humans.

6. Alien Planets Seen Directly

Alien Planets Seen Directly
The first alien planets -- called exoplanets -- were being detected in the early 1990s, but not directly. In 2000, astronomers detected a handful by looking for a star's "wobble," or a star's slight dimming as the exoplanet passed in front of it. Today we know of 400 exoplanets. 

In 2008, astronomers using the Hubble Space Telescope and the infrared Keck and Gemini observatories in Hawaii announced that they had "seen" exoplanets orbiting distant stars. The two observatories had taken images of these alien worlds. 
The Keck observation was the infrared detection of three exoplanets orbiting a star called HR8799, 150 light-years from Earth. Hubble spotted one massive exoplanet orbiting the star Fomalhaut, 25 light-years from Earth.

These finds pose a profound question: How long will it be until we spot an Earth-like world with an extraterrestrial civilization looking back at us?

5. Humans Meld with Machines

Humans Meld with Machines
Cyborgs are becoming reality. In the last decade, much progress has been made with people controlling robotic limbs and computers with their minds.

In 2000, researchers at Duke University Medical Center implanted electrodes in monkeys’ brains and then trained them to reach for food using a robotic arm. Such a neurochip could one day restore motor function in paralyzed patients. 

A team from the MIT Media Lab Europe developed a non-invasive method for picking up brain waves and, in 2004, used those signals for the first time to control the movements of a video game character. 
Robotic limbs operated with nerve signals debuted in 2001 at the Rehabilitation Institute of Chicago. There, Jesse Sullivan, a double amputee, used the method to control both of his robotic arms. 

And in 2009, amputee Pierpaolo Petruzziello learned to control a biomechanical hand connected to his arm nerves with just wires and electrodes. Petruzziello became the first person to make complex movements -- finger wiggling, a fist, grabbing objects -- with a robotic limb, using just his thoughts. 

4. Stem Cells Found in New Sources

Stem Cells Found in New Sources
In 2001, President George W. Bush cut federal funding to scientists working with embryonic stem cells -- found in a tiny, hollow ball of about 70-100 human cells that could become anything in the human body -- because of ethical concerns. 

Embryonic stem cells were one of the most promising medical advances in years, with the potential to cure diseases from diabetes to cancer to genetic disorders, and more. 

In 2007, scientists from Kyoto University and the University of Wisconsin-Madison, working separately, essentially turned back the clock for adult skin cells, allowing these mature cells, which were preprogrammed to become skin, to act like embryonic stem cells. The adult cells became pluripotent cells, or cells that could end up being virtually any other kind of cell.

These pluripotent adult cells solved two big problems. Ethical concerns and financial restrictions could be avoided, and doctors could ultimately use cells with a person's own DNA to grow replacement organs that a patient would be less likely to reject.

3. Mars Surface Gives up Signs of Water

Mars Surface Gives up Signs of Water
In 2008, NASA's Mars Phoenix lander touched down on the Red Planet to confirm the presence of water and seek out signs of organic compounds.

Eight years before, the Mars Global Surveyor spotted what appeared to be gullies carved into the landscape by flowing water. More recently, the Mars Exploration Rovers have uncovered minerals that also indicated the presence of ancient water. But proof of modern-day water was elusive.
Then Phoenix, planted on the ground near the North Pole, did some digging for samples to analyze. During one dig, the onboard cameras spotted a white powder in the freshly dug soil. In comparison images taken over the coming days, the powder slowly vanished. After intense analysis, the white powder was confirmed as water ice.

This discovery not only confirmed the presence of water on the Red Planet, it reenergized the hope that some kind of microbial life might be using this water supply to survive. 

2. Human Genome Mapped

Human Genome Mapped
Coiled up inside every human cell sit 23 molecules that, if unwound and placed end to end, would stretch about three feet. Those molecules, known as chromosomes, contain all the instructions necessary to build an entire human being. 

It took more than 10 years and an international collaboration of scientists, but the year 2000 saw a rough draft of the entire human genome, followed by a completed version in 2003. 

The publicly funded Human Genome Project and its private competitor, Celera Genomics, constitutes one of the largest scientific endeavors in history, one that revealed in intimate detail just what makes up a human being.
With the information from individual genome maps, scientists can uncover new clues about everything from a person's body odor to mental disease.

Since decoding the human genome, dozens of other species have had their genomes sequenced, including pigs, dogs, bees, mosquitoes, puffer fish, chimpanzees, yeast, corn, and rice. With these maps in hand, scientists can and will discover new ways to heal diseases or improve crop yields.

1. Glaciers Melting Fast

Glaciers Melting Fast
When the 21st century began, scientists studying Earth’s climate thought the gigantic ice caps on Greenland and Antarctica would melt slowly around the edges and lag behind the overall global warming of climate. 
But this past decade, the warmest on record, proved the climate modelers wrong.
Glaciers have been melting much faster than ever expected and researchers have been trying to understand why.The uptick in melting ice has not been restricted to the Arctic and Antarctic. Europe’s glaciers are now thought to be entering their final decades. 

The famous snows of Kilimanjaro and other low-latitude mountains could disappear completely. The thick, perennial sea ice of the Arctic is fast disappearing, which will likely bring ice-free summers to the Arctic Ocean.
There are global consequences to this melting. Rising seas will make more cities and islands vulnerable to catastrophic flooding like that which nearly killed New Orleans. Mountain glaciers around the world bring fresh water to billions. Any way you slice it, an Earth with less ice is a less hospitable planet.

source: http://news.discovery.com/human/discoveries-of-the-decade.html



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