All posts by LL

Man With A One Wheel Mind

unicycleA retired unicycling dermatologist has gotten press, and a few laughs, by claiming a link between testosterone and humor.

Sam Shuster of Newcastle upon Tyne, U.K., rode around town on his unicycle for a year, recording the reactions of 400 passersby. Reporting in the 22 December 2007 issue of the British Medical Journal, Shuster relates that about 75% of male reactions were “attempts at comedy,” whereas 95% of the females “praised, encouraged, or expressed concern.” The most aggressive reactions came from youthful males, who shouted things such as “Fall off, granddad” and kicked soccer balls at him. Responses mellowed with time, Shuster observed, with older men joking about his having lost a wheel or his handlebars. Elderly men tended to comment on the difficulty, saying things such as “It’s quicker to walk.” Shuster’s interpretation is that as men age, “aggression is concealed by wit.” He speculates that humor eventually takes on a life of its own, persisting beyond high testosterone levels.

Sociologist Alan Booth of Pennsylvania State University in State College is skeptical of a testosterone-humor connection–except “to the extent humor means demeaning someone.” Aggression is “probably just one aspect” of humor, suggests psychologist Roy Baumeister of Florida State University in Tallahassee. He says that in his experience, men are often more likely than women to use self-deprecating humor, hardly an expression of aggression.

Originally appeared in Science Magazine as a Random Sample: [html] [pdf]

Internships Offer Ph.D.s Early Leap Into Job Market

Dalya Soond couldn’t quite picture herself in the buttoned-down world of industry research. But her 3-year Ph.D. program at the Babraham Institute in Cambridge, U.K., was funded in part by an industrial partner, and the terms included a 3-month private-sector internship–also known as a work placement. Two years into her research on a mouse-model study of a gene pathway’s role in the immune system, she joined UCB Celltech. She wasn’t sure how she would fit into corporate culture or how well she would manage to juggle a new project with her ongoing Ph.D. research. “I was a little bit hesitant,” she says.

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When Worlds Collide

collideOur solar system may have plenty of cosmic cousins. Scientists studying archived data have spotted an adolescent sunlike star with a dusty belt that shows evidence of the creation and violent destruction of baby planets. “There is no doubt that they are detecting the dusty debris of rocky [Earth-like] planet formation,” says Scott Kenyon of the Harvard-Smithsonian Center for Astrophysics. A report of the find, by a team headed by Joseph Rhee of the University of California, Los Angeles, is in press at The Astrophysical Journal.

Until 2005, astronomers had observed only very young possible planet-forming systems. Then data from the retired Infrared Astronomy Satellite revealed a more mature system, bolstering predictions that collisions continue well after planets form. The latest observation, from a star called HD 23514 in the Pleiades cluster, should “help generalize the model of planetary formation,” says David Trilling of the University of Arizona in Tucson. Combined, the two discoveries allowed the team to estimate that about 1 in 1000 stellar systems share our system’s turbulent past–and could share its present architecture.

First published in Science Magazine as a Random Sample: [html] [pdf].

Mooning About: Cassini Turns 10

cassiniNASA’s Cassini mission celebrated its tenth year last week by releasing images of the solar system’s preening beauty, Saturn, and its fawning entourage of moons and rings. Eagle-eyed researchers spotted “moonlets” plowing through the delicate rings and reported the results in this week’s issue of Nature.

The moonlets measure just 30 to 70 meters across, but most of the debris in the rings measures less than 10 meters, so the moonlets leave a traceable wake. Saturn’s rings vary in thickness from about 100 meters to slightly more than 1 km.

In the image, Epimetheus (116 km across) floats just above Titan (5150 km), the largest of Saturn’s moons. The light-colored streaks in the ring may be caused by moonlets. The dark-colored section in the middle of the ring is the 325-km-wide Encke gap, probably caused by a gravitational resonance.

Cassini has mapped 60% of Titan’s northern hemisphere, which is home to lakes, rivers, and seas of liquid methane and ethane. The southern half is slated to be mapped next.

Originally appeared in Science Magazine as a Random Sample: [html] [pdf]