Science & TechnologyS


People

Women's bodies 'choosy' about sperm: Australian study

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© unkThis handout photo shows human sperm. A woman's body may be unconsciously selective about sperm, allowing some men's to progress to pregnancy but killing off the chances of less suitable matches, an Australian researcher has said.
A woman's body may be unconsciously selective about sperm, allowing some men's to progress to pregnancy but killing off the chances of less suitable matches, an Australian researcher said Wednesday.

University of Adelaide professor Sarah Robertson said her research suggested that sperm contains "signalling molecules" that activate immunity changes in a woman so her body accepts it.

But some apparently healthy sperm failed to activate these changes, leading to the suggestion that the female system can be "choosy" about its biological mate, she said.

Evil Rays

Low-Radiation Cell Phones: All the Rage?

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© credit: © Kk5hy | Dreamstime.com
Ever progressive, San Francisco voted today to become the first city in the nation where retailers must display the radiation levels emitted by cell phones. This value, which will be posted alongside each cell phone model's features and prices, represents a potential new front in the extremely competitive and booming cell phone marketplace.

Backers of the ordinance, such as the Environmental Working Group (EWG), a Washington, D.C.-based advocacy organization, and San Francisco mayor Gavin Newsome, have essentially framed the right-to-know law as a "better safe than sorry" approach to cell phone safety.

Telescope

Hubble captures bubbles and baby stars

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© NASA, ESA and Jesús Maíz Apellániz (Instituto de Astrofísica de Andalucía, Spain)A spectacular new NASA/ESA Hubble Space Telescope image — one of the largest ever released of a star-forming region — highlights N11, part of a complex network of gas clouds and star clusters within our neighbouring galaxy, the Large Magellanic Cloud. This region of energetic star formation is one of the most active in the nearby Universe.
The Large Magellanic Cloud contains many bright bubbles of glowing gas. One of the largest and most spectacular has the name LHA 120-N 11, from its listing in a catalogue compiled by the American astronomer and astronaut Karl Henize in 1956, and is informally known as N11. Close up, the billowing pink clouds of glowing gas make N11 resemble a puffy swirl of fairground candy floss. From further away, its distinctive overall shape led some observers to nickname it the Bean Nebula. The dramatic and colourful features visible in the nebula are the telltale signs of star formation. N11 is a well-studied region that extends over 1000 light-years. It is the second largest star-forming region within the Large Magellanic Cloud and has produced some of the most massive stars known.

Sherlock

Oldest Portraits of Apostles Found in Rome

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© Tony GentileProfessor Fabrizio Bisconti shows the portraits of the Apostles Peter, Andrew, John and Paul were discovered in a catacomb underneath an office building near St. Paul's Basilica in Rome.
The oldest known icons of Jesus Christ's apostles have been found in a catacomb near St. Paul's Basilica in Rome, Vatican officials announced at a news conference on Tuesday.

Dating from the end of the 4th century, the full-face paintings depict three of Jesus' original 12 apostles -- St. Peter, St. Andrew and St. John -- as well as St. Paul, who became an apostle after Christ's death.

The Vatican already announced the discovery of St.Paul's icon last June, to mark the end of the Pauline year. But the portrait was part of a larger fresco that also included the full-face depictions of the other three apostles.

Located on the ceiling of a noblewoman's burial place in the catacombs of St. Tecla, the four circular portraits, about 50 centimeters (19.7 inches) in diameter, were buried in layers of white calcium carbonate caused by the extreme humidity and lack of air circulation.

Laptop

Newspaper Takes Stand Against "Comment Trolls"

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© PhysOrgA woman reads the online version of the New York Times on January 2010.
They lurk in the comments sections of websites, firing off inflammatory messages behind a cloak of anonymity.

"Comment trolls," as they're called, are the scourge of many a news site or blog seeking to make their comments section a forum for intelligent discussion.

Amid a growing debate among US newspaper editors over the practice of allowing anonymous comments, one New York publication is taking a stand.

The Buffalo News announced on Monday that it will begin requiring identification from people who want to leave comments on its website, BuffaloNews.com.

"We will require commenters to give their real names and the names of their towns, which will appear with their comments, just as they do in printed 'letters to the editor,'" Buffalo News editor Margaret Sullivan said.

Telescope

Six New Planets Discovered

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© CoRoT exoplanet programThe CoRoT family of planets.
An international team, including Oxford University scientists, has discovered six diverse new planets, from 'shrunken-Saturns' to 'bloated hot Jupiters', as well a rare brown dwarf with 60 times the mass of Jupiter.

The CoRoT (Convection, Rotation and Transits) space telescope is operated by the French space agency CNES. It discovers planets outside our solar system -- exoplanets -- when they 'transit', that is pass in front of their stars.

Once CoRoT detects a transit, additional observations are made from the ground, using a number of telescopes all over the world. Although astronomers cannot see the planets directly, they use the space- and ground-based data to measure the sizes, masses, and orbits of these new planets precisely. This is why, among all known exoplanets, those with transits yield the most complete information about planet formation and evolution.

"Each of these planets is interesting in its own right, but what is really fascinating is how diverse they are," said co-investigator Dr. Suzanne Aigrain from Oxford University's Department of Physics. "Planets are intrinsically complex objects, and we have much to learn about them yet."

Sherlock

Canada: 4600-Year-Old Skeleton Discovered in Northern Ontario

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© Scott Hamilton4,600 years ago a man was buried here, on the south shore of Big Trout Lake, in Northern Ontario.
A team of archaeologists, working with the Kitchenuhmaykoosik Inninuwug First Nation, has discovered a 4,600-year-old burial at the mouth of the Bug River, on the south side of Big Trout Lake in Canada.

Big Trout Lake is located in the far northwest of the province of Ontario. Even today it's difficult to access. The province's road system stops nearly 400 kilometres south of the area, making planes the most practical way to get in and out.

The lake is located on the same latitude as Manchester, but the climate is far colder. In the winter the temperature can go down below -30 degrees Celsius. The area around the lake is heavily forested with evergreen trees. The population encompassed by the Kitchenuhmaykoosik Inninuwug First Nation community is estimated to be around 1,200.

Kitchenuhmaykoosik Inninuwug chief Donny Morris told me in an interview that a group of fishermen were the first to come across the bones. Water levels were high on the lake last fall causing the shoreline to erode, exposing the burial.

Telescope

7th-Graders Discover Mysterious Cave on Mars

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© NASA/JPL-Caltech/ASUCalifornia 7th graders participating in the Mars Student Imaging Program, discovered this Martian pit feature at the center of the superimposed red square in this image while participating in a program that enables students to use the camera on NASA's Mars Odyssey orbiter. The feature, on the slope of an equatorial volcano named Pavonis Mons, appears to be a skylight in an underground lava tube.
A group of seventh-graders in California has discovered a mysterious cave on Mars as part of a research project to study images taken by a NASA spacecraft orbiting the red planet.

The 16 students from teacher Dennis Mitchell's 7th-grade science class at Evergreen Middle School in Cottonwood, Calif., found what looks to be a Martian skylight - a hole in the roof of a cave on Mars.

The intrepid students were participating in the Mars Student Imaging Program at the Mars Space Flight Facility at Arizona State University. The program allows students to frame a research question and then commission a Mars-orbiting camera to take an image to answer their question.

Satellite

ISS 'naut Snaps Aurora Australis

Impressive photo of southern light show

An astronaut aboard the International Space Station has captured an impressive snap of the Aurora Australis, while the orbiting outpost was over the Southern Indian Ocean at an altitude of 350km:

Aurora Australis
© NASAAurora Australis
NASA explains: "This striking aurora image was taken during a geomagnetic storm that was most likely caused by a coronal mass ejection from the Sun on May 24, 2010."

Sheeple

So That's Why Investors Can't Think for Themselves

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© Christophe VorletInvestor
From February through May, the Dow Jones Industrial Average gained more than 1000 points in an almost uninterrupted daily march upward. Then came the "flash crash" of May 6 and day after day of losses through May. Now, in mid-June, the market has been up six of the past seven days.

What accounts for these sudden moves? Why do investors so often seem to resemble a school of fish, all changing direction together?

Sometimes the most interesting answers to financial questions come from scientific labs. A study published last week in the journal Current Biology found that the value you place on something is likely to go up when other people tell you it is worth more than you thought, and down when others say it is worth less. More strikingly, if your evaluation agrees with what others tell you, then a part of your brain that specializes in processing rewards kicks into high gear.