Humans Share 70% of Genetics with Sea Sponges

photo by icelight/flickrNATURAL NEWS– An international team of scientists was recently surprised to discover that sea sponges — one of the oldest multicellular life forms — share nearly 70 percent of the same genes as human beings, according to a study published in the journal Nature.

The team worked for five years to sequence the genome of the 650-million year old group of organisms, which was one of the first to develop the specialized cell groups that characterize organs.

“The sponge represents a window on this ancient and momentous event,” said University of California-Santa Barbara researcher Kenneth S. Kosik. “Curiously, the cells of a sponge bear little resemblance to cells found in the rest of the animal kingdom. For example, sponges lack neurons; however, the sponge genome reveals the presence of many genes found in neurons.”

Significantly, many of the genes that sponges share with humans may play a role in the development of cancer.

“Once there is a transition from single cell to multicellular organisms, conflict is set up between the different cells of the multicellular organism,” researcher Todd Oakley said.

“It is in an individual cell’s best interest to keep replicating, and this actually is what cancer is — the uncontrolled replication of cells in the body. So in the history of animals, we can see this link with cancer, because the genes that are involved in the transition to multiple cells during evolution are also known to be linked to cancer.”

However promising, the recent findings are only the beginning in terms of uncovering new cancer therapies.

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© Natural News, 2010

Photograph by flickr user icelight

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Antimatter Atom Trapped For First Time, Say Scientists

BBC– Antimatter atoms have been trapped for the first time, scientists say. Researchers at Cern, home of the Large Hadron Collider, have held 38 antihydrogen atoms in place, each for a fraction of a second.

Antihydrogen has been produced before but it was instantly destroyed when it encountered normal matter. The team, reporting in Nature, says the ability to study such antimatter atoms will allow previously impossible tests of fundamental tenets of physics.

The current “standard model” of physics holds that each particle – protons, electrons, neutrons and a zoo of more exotic particles – has its mirror image antiparticle.

The antiparticle of the electron, for example, is the positron, and is used in an imaging technique of growing popularity known as positron emission tomography.

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© BBC, 2010

Photograph by flickr user Temari 09

Mimic Octopus

 

NATIONAL GEOGRAPHIC NEWS– Octopuses are thought to be one of the most intelligent invertebrates and can change the color and texture of their skin to blend in with rocks, algae, or coral to avoid predators. But until now, an octopus with the ability to actually assume the appearance of another animal had never been observed.

“Having studied many octopus species in the wild, I am never surprised by the color and shape change capacities of these animals,” said Mark Norman of the Melbourne Museum in Australia. “However, this animal stood out as it was the only one we’ve encountered that goes beyond camouflage to take on the guise of dangerous animals.”

Norman and fellow researchers Julian Finn of the University of Tasmania in Australia and Tom Tregenza of the University of Leeds in England describe the octopus mimic in the September 7 issue of Proceedings of the Royal Society of London.

“This,” Tregenza said, “is a rather dramatic animal.”

Mimicry is a fairly common survival strategy in nature. Certain flies, for example, assume the black and yellow stripes of bees as a warning to potential predators. But the adaptable octopus is the first known species that can assume multiple guises.

© National Geographic, 2010

Can Mushrooms Rescue the Gulf?

photo by hans s/flickrYES! MAGAZINE– For more than a decade, mycologist and inventor Paul Stamets has known that mushrooms eat oil. There were still a few kinks to work out; bringing the technology to scale and winning the acceptance of government agencies were two of the most challenging. Yet the basic science was solid and had been replicated many times by other scientists.

Then Stamets heard about the Deepwater Horizon oil spill in the Gulf of Mexico. While his first reaction was horror and regret, he also knew that he might be able to offer practical solutions, while at the same time giving his oil-eating mushrooms a chance to show their stuff.

He wasn’t the only one who thought mushrooms might be part of the solution. In the days after the explosion in the Gulf, the EPA contacted him several times to request a proposal. They wanted to understand how mycoremediation—the reduction of toxic compounds into harmless ones by fungi—could work as a component of their cleanup strategy for the spill.

Stamets drafted a three-page proposal and sent it off. Then he ramped up the pace of his research and shifted his focus to finding oil-eating mushrooms that could tolerate the Gulf of Mexico’s salt water and powerful sun.

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© YES! Magazine, 2010

Photograph by flickr user hans s

Large Hadron Collider Generates ‘Mini-Big Bang’

hadron collider BBC– Dr David Evans: “From conception to design and building this, it’s taken about 20 years.”

The Large Hadron Collider has successfully created a “mini-Big Bang” by smashing together lead ions instead of protons. The scientists working at the enormous machine on Franco-Swiss border achieved the unique conditions on 7 November.

The experiment created temperatures a million times hotter than the centre of the Sun. The LHC is housed in a 27km-long circular tunnel under the French-Swiss border near Geneva.

Up until now, the world’s highest-energy particle accelerator – which is run by the European Organization for Nuclear Research (Cern) – has been colliding protons, in a bid to uncover mysteries of the Universe’s formation.

Proton collisions could help spot the elusive Higgs boson particle and signs of new physical laws, such as a framework called supersymmetry.

But for the next four weeks, scientists at the LHC will concentrate on analysing the data obtained from the lead ion collisions.

This way, they hope to learn more about the plasma the Universe was made of a millionth of a second after the Big Bang, 13.7 billion years ago.

One of the accelerator’s experiments, ALICE, has been specifically designed to smash together lead ions, but the ATLAS and Compact Muon Solenoid (CMS) experiments have also switched to the new mode.

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© BBC, 2010

Photo by flickr user Image Editor

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