physical

Double asteroid trouble may have wiped out dinosaurs

When asteroids attack, dinosaurs lose. Though there are still competing theories as to why we lost awesome animals like Tyrannosaurus rex and Velociraptors, many scientists look to a long-ago asteroid impact to explain the wipeout.

A study published in Earth and Planetary Science Letters adds a new wrinkle to the asteroid assumption by suggesting that the dinos may have had to contend with not one, but two deadly balls of flying space rock. Titled "Morphology and population of binary asteroid impact craters," the study was lead by Katarina Miljkovic from the Institute of Earth Physics in Paris.

If you look out into space around Earth, you'll find that about 15 percent of asteroids are binary, meaning they're traveling in pairs. However, only 2 to 4 percent of craters on Earth have been labeled as binary impacts. Miljkovic believes this number is under-reported and that many binary asteroids have been overlooked because their craters overlap.… Read more

Scientist: Hawking is 'brain in a vat'

The generally accepted form of wishing someone a happy birthday is to sing to the lucky person. Or perhaps buy him or her a gift.

A less accepted form is to compare the birthday person to Darth Vader and suggest he or she is merely a "brain in a vat."

Still, Helene Mialet, a UC Berkeley anthropologist of science, chose the path slightly less trodden.

Writing in Wired, she offered that perhaps Hawking should be referred to as Obi-Wan refers to Darth Vader: "More machine than man."

She went on to suggest that the eminent physicist'… Read more

At last! Angry Birds and CERN to create board game

I think I have found a solution for Zynga.

The company needs to get together with the United Nations peacekeeping forces around the world and create a board game in which people get killed, but not really.

How is it that I have had this quite brilliant notion?

Well, I have been stimulated by the news that Rovio, they who have enriched so many lives with Angry Birds, have got together with CERN (the European Organization for Nuclear Research, landlord for the Large Hadron Collider) to create new and amusing experiences to exercise young minds.

These will be under a … Read more

Want a Nobel? Forgo glasses, shave, wait till you're 60

When I interviewed Japanese scientist Shinya Yamanaka back in 2008, I had an inkling he'd win the Nobel Prize one day for his work on stem cells. I didn't pay any mind to his appearance or background.

Yamanaka shared the Nobel in physiology or medicine this week with Britain's John Gurdon for their groundbreaking work on changing adult cells into stem cells, which can become any type of cell in the body.

It turns out that Yamanaka defied the odds. He was born in September, he's 50, bespectacled, and Japanese. According to a historical survey of Nobel laureates by the BBC, which goes back to 1901, those aren't favorable characteristics. … Read more

Nobel Prize in physics awarded for work in quantum optics

Two researchers received the Nobel Prize in physics today for their work in manipulating single particles of light or matter -- advancements that could help build a new type of super-fast computer based on quantum physics.

Serge Haroche of France and David J. Wineland of the United States independently developed methods for measuring and manipulating individual particles while preserving their quantum-mechanical nature. The Nobel citation said such advancements, which allow researchers to directly observe individual quantum particles without destroying them, were previously thought unattainable.

"For single particles of light or matter the laws of classical physics cease to apply … Read more

Google's wonderfully random Niels Bohr doodle

I fancy that Google's doodlers sit in a room where every wall is a different color.

I imagine that they walk into work everything morning, not knowing what they will be doing, thinking or smoking.

And then they just chat.

Someone says something. Someone else says something entirely unrelated. And then, through some odd finger-pointing and head-bobbing, they reach a conclusion.

How else to explain today's doodle which celebrates the birthday of one of physics' great lights, Niels Bohr?

Bohr had such refined talents that not only did he win the Nobel Prize for Physics in 1922, but … Read more

Did Higgs yield the most authors in a science study?

Scientists who announced two months ago observations of the elusive Higgs boson, the so-called "God particle," have had their research published in the peer-reviewed Physics Letters B, along with an astounding list of thousands of authors.

More than 5,000 researchers around the world are said to have contributed to the landmark studies by the CMS and ATLAS teams working at the European Organization for Nuclear Research (CERN). They said on July 4 the new boson they had observed was consistent with the Higgs, believed to be responsible for imparting all elementary particles in the universe with mass.

Two articles by the teams are each about 30 pages long. The combined author list takes up 19 pages of single-spaced text and appears to have roughly 6,000 names. Wouldn't that be fun to cite as a footnote in full? … Read more

Scientists teleport info 90 miles across islands

If only we were quantum states, we'd be playing Kirk and Scotty, popping around the universe until the inevitable failure in the transporter circuits.

European and Canadian scientists are pushing the envelope on quantum teleportation after having succeeded in beaming quantum states across some 90 miles in the Canary Islands.

The laser-locked telescopes on the islands of La Palma and Tenerife served as transporter rooms, teleporting information about the state of a pair of "entangled" particles.

The entanglement links the particles such that a change in one is registered in the other despite great distances between them. … Read more

Higgs boson revelation set for July 4: Fireworks, or dud?

Fireworks. Hot dogs. Beach blankets. Particle physics.

July 4 this year won't be just about Americans celebrating Independence Day and unofficially kicking off the the summer vacation season. It could also bring news of some significance from physicists in Europe who've been in hot pursuit of a mysterious subatomic particle known as the Higgs boson -- and a better glimpse at the nature of the universe.

The big-brain folks at CERN on Wednesday will be holding a seminar at which they plan to provide an update on the Higgs search, divulging the preliminary results of their 2012 data … Read more