He smells

February 19th, 2017

One of NASA’s best noses got a good writeup in 2003, in an official bulletin called “NASA’s Nose: Avoiding smelly situations in space“:

galdrichThanks to George Aldrich and his team of NASA sniffers, astronauts can breathe a little bit easier. Aldrich is a chemical specialist or “chief sniffer” at the White Sands Test Facility’s Molecular Desorption and Analysis Laboratory in New Mexico. His job is to smell items before they can be flown in the space shuttle.

Aldrich explained that smells change in space and that once astronauts are up there, they’re stuck with whatever smells are onboard with them. In space, astronauts aren’t able to open the window for extra ventilation, Aldrich said.

The Know I Know web site, too, recently took a look at the smelling situation.

(Thanks to Scott Langill for bringing this to our attention.)

Many women have men in the brain

February 18th, 2017

The old saying that a woman has “men on the brain” can be accurately supplanted by saying that many women have men IN the brain. This study explains the biological facts:

guthrieMale microchimerism in the human female brain,” William F.N. Chan, Cecile Gurnot, Thomas J. Montine, Joshua A. Sonnen, Katherine A. Guthrie [pictured here], and J. Lee Nelson, PLoS One, vol. 7, no. 9, 2012, e45592. the authors, at the Fred Hutchinson Cancer Research Center, Seattle, and at the University of Washington, report:

“In this study, we quantified male DNA in the human female brain as a marker for microchimerism of fetal origin (i.e. acquisition of male DNA by a woman while bearing a male fetus)…. We report that 63% of the females (37 of 59) tested harbored male microchimerism in the brain. Male microchimerism was present in multiple brain regions…. In conclusion, male microchimerism is frequent and widely distributed in the human female brain.”

BONUS: The 2005 study “Male microchimerism in women without sons: quantitative assessment and correlation with pregnancy history,” which says: “Male microchimerism was not infrequent in women without sons.”

BONUS [only distantly related]: One of the studies honored by the 2015 Ig Nobel Medicine Prize reports how male DNA, obtained via a lengthy, intimate kiss, can sometimes be found in the saliva of the female who engaged in that kiss. That study is “Prevalence and Persistence of Male DNA Identified in Mixed Saliva Samples After Intense Kissing.”

You’re invited to the Improbable Research show at the AAAS meeting Saturday

February 16th, 2017

Join us, if you’re in Boston this Saturday night, at the annual Improbable Research session at the AAAS Annual meeting! Here are details:

AAAS Annual Meeting, Sheraton Boston Hotel (in the Prudential Center), in Constitution Ballroom A, Boston, Massachusetts, USA. — February 18, 2017, Saturday, 8:00 pm.  This year’s Improbable Research session will feature:

This evening special session is open free to the public. BUT NOTE: Every year this session fills rapidly, so we suggest you arrive a little early, if you want to get into the room.

This is the research study that introduced the Dunning-Kruger effect:

Sensation Seeking, Sports Cars, and Hedge Funds (new study)

February 16th, 2017

“The emerging [hedge fund] manager who goes out and buys a fancy sports car right off the bat is someone you probably want to avoid.”

– informed an article in Business Insider (Singapore), February 2016. But was the statement measurably valid? To find out Stephen Brown, Yan Lu, Sugata Ray and Melvyn Teo set up a research project to empirically investigate the so-called ‘Red Ferrari Syndrome’.

An analysis of 48,778 hedge funds (with reference to the automobile preferences of the funds’ managers, and the funds’ results over time) showed striking results.

“The empirical results are striking. We find that hedge fund managers who purchase performance cars take on more investment risk than do fund managers who eschew performance cars. Specifically, sports car drivers deliver returns that are 1.80 percentage points per annum more volatile than do non-sports car drivers. This represents a 16.61 percent increase in volatility over that of drivers who shun sports cars. Similarly, drivers of high horsepower and high torque automobiles exhibit 1.14 and 1.25 percentage points per annum more volatility, respectively, in the funds that they manage than do drivers of low horsepower and low torque automobiles.”

See: Sensation Seeking, Sports Cars, and Hedge Funds NYU Working Paper, December 2016.

The photo shows the new, red, Ferrari J50

Nobel laureates don’t grow on trees

February 15th, 2017

Nobel laureates don’t grow on trees, but they do go a-wandering in pleasant places. Sheldon Glashow (standing on the left, and possessor of a 1979 Nobel Prize for physics) and Rich Roberts (standing on the right, and possessor of a 1993 Nobel Prize for physiology or medicine) sent us this photo of them in Bali.

Rich Roberts writes:

“Taken in the monkey forest in Bali yesterday. The gentleman in the middle is from Brazil. His name is Oscar, and the shirt was bought for him by his girlfriend. We thought you might find a good use for this photo.”

Until we find a good use for the photo, we are posting it here on the Improbable Research blog.