Why elephants rarely get cancer is a mystery that has stumped scientists for decades.  

If your partner has sex with someone else, it is considered infidelity - even if no emotions are involved. But it is also considered infidelity when your significant other develops a close personal relationship with someone else, even if there is no sex or physical intimacy involved.

A recent Norwegian study shows that men and women react differently to various types of infidelity. Whereas men are most jealous of sexual infidelity, so-called emotional infidelity is what makes women the most jealous. Evolutionary psychology may help explain why this may be.

Significant gender differences

Yesterday I chaired the selection committee to choose the student who will be hired in the AMVA4NewPhysics network by the Padova section of INFN, and during the interviews I asked all candidates a couple of "easy" physics questions, meant to test the students' reasoning process rather than their prior knowledge.

The first question was only apparently easy - even too much, from the outset. The fact is, the devil is always hiding in the details, as I immediately realized as I tested it by asking an experienced colleague to answer it. He got part of the question wrong, but in doing so he clarified to me that there was a non trivial aspect below the surface.

If you've ever waited on an airport runway for your plane to be de-iced, had to remove all your food so the freezer could defrost, or arrived late to work because you had to scrape the sheet of ice off your car windshield, you know that ice can cause major headaches. 

In a new study, Nikola-Michael Prpic et al. have identified the driving force behind the evolution of a leg novelty first found in spiders: knees.  

With eight hairy legs and seven joints on each---that's a lot of joints for a spider to coordinate in order to take even a single step. To find some answers, Prpic's research team honed in on a gene called dachshund (dac). The gene was first discovered in fruit flies, and the discoverers named the missing leg segments and shortened legs that result from dac mutant flies after the short-legged dog breed of the same name. 

In pop culture, conspiracy believers like FBI agent Fox Mulder on The X Files or professor Robert Langdon in The Da Vinci Code tend to reject the notion of coincidence or chance; even the most random-seeming events are thought to result from some sort of intention or design. 

Psychologists have suggested that such a bias against randomness may explain real-world conspiracy beliefs but new research from psychologists at the University of Fribourg and the University of Paris-Saint-Denis shows no evidence for a link between conspiracist thinking and perceptions of order, design, or intent.

The rising cost of treating and caring for a growing number of cancer patients threatens economic development in low and middle income countries (LMICs), making prevention a key element of health care plans, according to a new commentary.

Authored by researchers from the International Agency for Research on Cancer (IARC), the American Cancer Society, and Imperial College of London, the commentary says in the absence of the implementation of prevention, LMICs will not have the resources to diagnose and treat all new cancer patients, and the economic burden will soon become unsustainable. The commentary appears in the Journal of the National Cancer Institute (JNCI).

Residents of Copenhagen, Denmark, are more likely than Houstonians to believe immigration threatens their country's culture. That's one of several findings in a new survey from Rice University's Kinder Institute for Urban Research.

Unlike ales, lager beers differ little in flavor. But now, by creating new crosses among the relevant yeasts, Kevin Verstrepen, PhD, Stijn Mertens, and their collaborators have opened up new horizons of taste. 

The relative uniformity of flavor among lagers turned out to result in significant part from a lack of genetic diversity among the yeasts. Genetic studies showed that lager yeasts had resulted from just two crosses between the parent yeasts, Saccharomyces cerevisiae, and S. eubayanus. The problem was that the two yeast species are so different--like lions and tigers--as to make successful crosses rare.