News / Science & Technology

Physicists Find Evidence of Dark Matter

Physicists Find Evidence of Dark Matteri
X
April 04, 2013 2:13 PM
The find is significant because dark matter is thought to make up about a quarter of all the matter in the universe
VOA News
Scientist say they may have evidence of dark matter, the theoretical substance that holds the cosmos together, but has never been observed directly.

During a news briefing Wednesday in Washington, scientists from the U.S. space agency, NASA, and the European particle physics laboratory near Geneva, Switzerland, said a $2 billion cosmic ray detector on the International Space Station has found what they call a "footprint" of something that could be dark matter.
 
But physicist Samuel Ting says the first results from the Alpha Magnetic Spectrometer, known as the AMS, could also be showing energy emitted from Pulsars, rotating, radiation-emitting stars.

"I said our evidence supports the existence of dark matter, but cannot rule out the origin comes from pulsars. But I'm confident, with enough time, because we will be on the Space Station for the lifetime of the Space Station, we should be able to solve this problem," Ting said.

The results from the detector are significant, because dark matter is thought to make up about a quarter of all the matter in the universe.
 
Unraveling the mystery of dark matter could help scientists better understand the composition of our universe and, more particularly, what holds galaxies together.
 
The seven-ton detector, was sent into space two years ago. It has a magnet ring, about a meter around at its core, and is transmitting the data to the European Organization for Nuclear Research, known as CERN, where it is being analyzed.

The new findings are based on seeing an excess of positrons - positively charged subatomic particles.

Since the highly accurate AMS magnetic detector began studying cosmic ray particles in space, it has found about 400,000 positrons where surging energies indicate they might have been created when particles of dark matter collided and destroyed each other.  
 
The AMS will search for antimatter and dark matter for the rest of the life of the space station - until at least 2020 - transmitting data to an international team of 600 scientists in Geneva.

You May Like

EU Court Fines Poland for Hosting CIA 'Black Sites'

Ruling is first time a court has acknowledged suspects were held and tortured at the sites, under US program launched following the 9/11 terrorist attacks More

Migrant Issues Close to Home Spur Groups to Take Action

Groups placing water, food in the desert, or aiding detainees after release, have one common goal: no more deaths of migrants crossing illegally into the US More

Video At AIDS Conference, Prevention Pill Stirs Excitement

Truveda shows promise, spurring debate over access and other approaches More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Treatment for Childhood Epilepsy Heats up Medical Marijuana Debatei
X
Shelley Schlender
July 24, 2014 6:43 PM
In the United States, marijuana is classed as an illegal drug by the federal government. But nearly half the states have legalized it, to some degree. Proponents say some strains of marijuana might have exceptional health benefits, for treating pain or inflammation in chronic conditions such as cancer, multiple sclerosis and epilepsy. Shelley Schlender reports on a strain of medical marijuana developed in Colorado that is reputed to reduce seizures in childhood epilepsy
Video

Video Treatment for Childhood Epilepsy Heats up Medical Marijuana Debate

In the United States, marijuana is classed as an illegal drug by the federal government. But nearly half the states have legalized it, to some degree. Proponents say some strains of marijuana might have exceptional health benefits, for treating pain or inflammation in chronic conditions such as cancer, multiple sclerosis and epilepsy. Shelley Schlender reports on a strain of medical marijuana developed in Colorado that is reputed to reduce seizures in childhood epilepsy
Video

Video Airbus Adds Metal 3D Printed Parts to New Jets

By the end of this year, European aircraft manufacturing consortium Airbus plans to deliver the first of its new, extra-wide-body passenger jets, the A350-XWB. Among other technological innovations, the new plane will also incorporate metal parts made in a 3-D printer. VOA's George Putic has more.
Video

Video Death Toll From Israel-Gaza Conflict Surpasses 700

Gaza officials say a shelling hit a compound housing a United Nations-run school in the Gaza Strip, killing more than a dozen people, during an Israeli offensive in the area. Heavy fighting between the Israeli military and Hamas militants continued on Thursday, pushing up the death toll. So far, more than 730 Palestinians and 35 Israelis have been killed in the conflict. VOA's Scott Bobb has the latest from Jerusalem.
Video

Video AIDS Conference Welcomes Exciting Developments in HIV Treatment, Prevention

Significant strides have been made in recent years toward the treatment and prevention of HIV, the virus that causes AIDS. This year, at the International AIDS Conference, the AIDS community welcomed progress on a new pill that may prevent transmission of the deadly virus. VOA’s Anita Powell reports from Melbourne, Australia.
Video

Video Israel Targets Gaza Supply Tunnels

The Israeli military has launched a ground operation in Gaza to destroy the myriad tunnels that may have been used to smuggle weapons to Hamas. VOA's Zlatica Hoke reports that could mean more hardship for the people of Gaza, who obtain some of their essential supplies through these underground passages
Video

Video Researchers Target Low-Cost Avatar Technology

Scientists at the University of Southern California Institute for Creative Technologies say 3-dimensional representations could revolutionize social media. Elizabeth Lee has more from Los Angeles.
Video

Video IAEA: Iran Turns its Enriched Uranium Into Less Harmful Form

Iran has converted its stockpiles of enriched uranium into a less dangerous form that is more difficult to use for nuclear weapons, according to the United Nations’ Atomic Energy Agency. The move complies with an interim deal reached with Western powers on Iran's nuclear program last year, in exchange for easing of sanctions. Henry Ridgwell reports for VOA from London.
Video

Video In Cambodia, HIV Diagnosis Brings Deadly Shame

Although HIV/AIDS is now a treatable condition, a positive diagnosis is still a life altering experience. In Cambodia, people living with HIV are often disowned by friends, family and the community. This humiliation can be unbearable. We bring you one Cambodian woman’s struggle to overcome a life tragedy and her own HIV positive diagnosis.

AppleAndroid