"Not tonight, dear, I have a headache." Generally speaking, that line is attributed to the wife in a couple, implying that women's sexual desire is more affected by pain than men's.

Now, researchers from McGill University and Concordia University in Montreal have investigated, possibly for the first time in any species, the direct impact of pain on sexual behaviour in mice. Their study, published in the April 23 issue of the Journal of Neuroscience, found that pain from inflammation greatly reduced sexual motivation in female mice in heat -- but had no such effect on male mice.

Researchers from the University of Texas Medical Branch and the Stillbirth Collaborative Research Network have identified a link between stillbirth and either restricted or excessive fetal growth. Findings from the study are online in the April 22 issue of PLOS Medicine.

Using a new approach developed by the network to estimate gestational age in stillborn babies, Dr. Radek Bukowski, lead researcher and professor of obstetrics and gynecology at UTMB, and his colleagues evaluated 663 stillbirths and 1932 live births that occurred over a two-and-a-half year period at 59 hospitals in five U.S. regions.

In Science Left Behind I wrote a segment about a national discrimination issue that was eroding not only science, but the very notion of fairness in our culture.

No, it wasn't the lack of Republicans in faculty jobs at universities. It was instead that, for decades, schools had been using skin color to routinely impede the chances for the best students to get admitted. They were using racial profiling to skew who got to attend.

This wasn't 1950s Alabama, it was - and is - mainstream academia from the 1970s on.

Today, the Boy Scouts of America seemed to back peddle on last year’s promise to accept and recognize gay scouts--by rejecting and banning a gay scoutmaster who was...gay.

Why did the organization do that?

Nasty administrators? Probably not.

Bigoted leadership? Maybe.

I suspect another factor: the organization’s core values.

Apparently the EPA has not yet discovered how to do a video conference.

The U.S. Environmental Protection Agency has announced that Administrator Gina McCarthy will promote President Obama’s Climate Action Plan to cut carbon pollution, slow the effects of climate change and leave a cleaner environment for future generations by doing an Earth Week Tour, flying around to talk about how we should cut emissions.

She likes to fly. When she is not flying around to save all of us from emissions, she is commuting to Washington, D.C. weekly from her home in Boston.

Our universe is eternal, expanding indefinitely, and not threatened by any form of 'heath death'. All evidence points into this direction. In fact, at the end of the nineteenth century Ludwig Boltzmann had collected all the evidence to draw such conclusions. His consistent reasoning on how to render the reversible laws of physics compatible with the second law of thermodynamics brought him close, but he failed to make the final decisive steps.

Ok, I realize that at Boltzmann's time our knowledge of the universe didn't stretch beyond the Milky Way, the island of stars that we inhabit. And yes, I admit reasoning here with the benefit of a heap of hindsight. But even now, in the twenty-first century, this hindsight is apparently not distributed uniformly.

Researchers report that they have discovered a new genus and species of electric knifefish in several tributaries of the Negro River in the Amazonia State of Brazil.

Professor Cristina Cox Fernandes at UMass Amherst, with Adília Nogueira and José Antônio Alves-Gomes of INPA, describe the new bluntnose knifefish in the current issue of the journal Proceedings of the Natural Sciences of Philadelphia and detail the new genus and species' anatomy, range, relationship to other fish, salient features of its skeleton, coloration, electric organs and patterns of electric organ discharge (EOD).

True to their name, these fish produce electric discharges in distinct pulses that can be detected by some other fish. 

Anywhere from 40 to 60 percent of women who undergo routine screening mammography during a ten-year period will experience a false-positive mammogram.

They then suffer anxiety while they undergo additional testing, sometimes involving a biopsy, to confirm that cancer is not present.

Researchers have suspected that increased anxiety, pain, and the bother of additional tests might adversely affect the quality of life for women who experience false-positive screening mammograms. In a new paper, Dartmouth scholars used data collected by the Digital Mammographic Imaging Screening Trial (DMIST), which was conducted by the American College of Radiology Imaging Network (ACRIN), to study the impact a false-positive mammogram has on women's lives.

Are you on the go a lot? Is your time so limited even moving your eyeballs is putting you behind?

If so, there is an app for that. If not, app developers are looking to create a market for that kind of personalized optimization, so they have devised speed-reading software that eliminates the time we supposedly waste by moving our eyes as we read.

Are eyes just passive conduits getting in the way of the modern world with their ancient biological mechanism? 

A paper in Psychological Science argues that eye movements we make during reading actually play a critical role in our ability to understand what we've just read.

The term "tween" is a marketing colloquialism for a child who is between the ages of 8 and 12 -not quite a little kid but not yet a teenager. A pre-adolescent.

This demographic watches more television than any other age group and is thus considered a lucrative market for advertisers. Tween television programming often consists of the following: "teen scene" and "action-adventure" , which a pair of academics say is shaping stereotypes in tweens rather than reflecting what kids want to watch.