Brief activation of signaling protein stimulates hair follicle growth phase

University of Michigan graduate student David Van Mater knew something strange was going on when he noticed stubble on the shaved skin of experimental mice in his laboratory. Instead of the tumors he had originally expected to see, the mice were growing hair.

Van Mater had stumbled on the discovery that beta-catenin (“bay-tuh-kuh-TEEN-in”), a signaling protein involved in embryonic development and se

The ability to understand how small bodies such as moons switch from orbiting the Sun to orbiting a planet has long remained one of the outstanding problems of planetary science. A paper published in Nature on 15 May shows how this problem has been resolved using chaos theory, enabling scientists to predict where astronomers might search for new moons orbiting the giant planets.

In the last couple of years many small moons have been found orbiting the giant planets in our Solar System. For e

We humans are poorly adapted for underwater vision. However, the Moken peoples of south-east Asia manage to collect shells, clams and sea cucumbers using no visual aids when diving to a depth of 3 or 4 metres. Scientists from Lund University in Sweden have now measured the visual acuity of these children and have found that their ability to see well underwater is not a myth: their acuity in this environment is indeed superior to that of European children. The scientists have also found an explanation

Scientists believe they have opened the door to an overlooked area of bird behaviour – the use of social scents. The basic assumption is that vision and hearing are the main senses that birds use to signal each other, e.g. the colour of plumage; the sound of birdsong. This is questioned by new experimental evidence observed in the Crested Auklet, an arctic seabird.

Research by scientists at Swarthmore College and elsewhere, published in Proceedings B, explored the Crested Auklets’ frequent “

The old adage “treat them mean keep them keen” has been turned on its head by new research published in the Royal Society’s journal Proceedings: Biological Sciences today; at least as far as hyenas are concerned.

Scientists studying Serengeti spotted hyena clans in Tanzania found that male hyenas displaying “friendly” behaviour had much more luck with the ladies than their more aggressive counterparts.

Using genetic techniques, the researchers discovered that males rarely sired o

Speed-up may make “topic-sensitive” page rankings feasible Computer science researchers at Stanford University have developed several new techniques that together may make it possible to calculate Web page rankings as used in the Google search engine up to five times faster. The speed-ups to Google’s method may make it realistic to calculate page rankings personalized for an individual’s interests or customized to a particular topic. The Stanford team includes grad