Graying hairs that crop up with age could be more than just nature, they could be signs of stress, according to a new report in the June 12 issue of Cell. 

The researchers say that the kind of "genotoxic stress" that does damage to DNA depletes the melanocyte stem cells (MSCs) within hair follicles that are responsible for making those pigment-producing cells. Rather than dying off, when the going gets tough, those precious stem cells differentiate, forming fully mature melanocytes themselves. Anything that can limit the stress might stop the graying from happening, the researchers said. 

Who says politics and science can't mix?   Well, we say they shouldn't mix but we're rare in science media.  Yet sometimes political events can make for great science studies too.

Case in point, the value neuroscientists at the University of Washington got when former President George W. Bush and Iraq's Prime Minister Nouri al-Maliki had shoes thrown at them by a crazy Iraqi 'reporter' during a Baghdad news conference. 

When Bush ducked and Maliki didn't flinch as the first shoe sailed toward them, it was a real-world example supporting the theory that there are two independent pathways in the human visual system. 

Can you tell when your dog has done something wrong by his appearance?   Not really, says Alexandra Horowitz, Assistant Professor from Barnard College in New York, in Behavioural Processes.   It's mostly what you want to see.

Horowitz was able to show that the human tendency to attribute a "guilty look" to a dog was not due to whether the dog was indeed guilty. Instead, people see 'guilt' in a dog's body language when they believe the dog has done something it shouldn't have – even if the dog is in fact completely innocent of any offense.

A study of patients and members of the public has shown that most lack even basic knowledge of human anatomy. The research, featured in the journal BMC Family Practice, found that people were generally incapable of identifying the location of major organs, even if they were currently receiving relevant treatment.

The search for planets capable of sustainable life (as we know it) is on, but with an infinite number of planets astronomers are focusing their attention on each system's 'habitable zone', where heat radiated from the star is just right to keep a planet's water in liquid form. They have found planets orbiting red dwarf stars because those make up about three-quarters of the stars close to our solar system. Potentially habitable planets must orbit closer to those stars, perhaps one-fiftieth the distance of Earth to the sun, since they are smaller and generate less heat than our sun.

Matthew C. Nisbet, assistant professor in the School of Communication writing in Nature Biotechnology, says there are changes that must be made to ensure quality science communication in the future. Some of his recommendations, based on the results of a science communication workshop in Washington, D.C., are: 1. Scientists should pursue a trust- and dialogue-based relationship with the public. The goal is not to 'sell the public' but to democratize public input about scientific issues so that members of the public can meaningfully participate in science-related decision making, which is not framing, but then ...