Shark teeth help scientists uncover predator's history

Row after row of razor-sharp teeth: They are the lasting terror of shark-filled nightmares, but these bony record books are a dream come true for shark researchers according to Science daily.

Right now, a team of researchers is studying living great whites and other sharks -- as well as fossilized shark teeth -- to gain insight into everything from shark behavior to their ancient ancestors. They are are using the latest in computed tomography scans to create detailed, high-resolution, three-dimensional models to better analyze shark tooth anatomy, development and evolution.

This latest technology allows the team -- Willy Bemis, professor of ecology and evolutionary biology, Cornell graduate student Josh Moyer and Micro CT facilities director Mark Riccio -- to examine patterns of tissues and vasculature; they can see the channels left behind by blood vessels and capture images of the developing teeth as they begin to mineralize.

Your left side is your best side: Our left cheek shows more emotion, which observers find more aesthetically pleasing

Your best side may be your left cheek, according to a new study by Kelsey Blackburn and James Schirillo. Their work shows that images of the left side of the face are perceived and rated as more pleasant than pictures of the right side of the face, possibly due to the fact that we present a greater intensity of emotion on the left side of our face.

Others can judge human emotions in large part from facial expressions. Our highly specialized facial muscles are capable of expressing many unique emotions.

Research suggests that the left side of the face is more intense and active during emotional expression. It is also noteworthy that Western artists' portraits predominantly present subjects' left profile.

Blackburn and Schirillo investigated whether there are differences in the perception of the left and right sides of the face in real-life photographs of individuals.

The authors explain: "Our results suggest that posers' left cheeks tend to exhibit a greater intensity of emotion, which observers find more aesthetically pleasing.

Strep solution? Vaccine may be in the works for flesh-eating bacteria

Many people suffer Group A Streptococcus infections, typically as children when they get strep throat. In extreme cases, the bacteria can lead to necrotizing fasciitis, a flesh eating bacteria. A recent discovery, however, could soon lead to a vaccine.

Group A Streptococcus is responsible for a wide range of maladies, from strep throat to toxic shock syndrome to necrotizing fasciitis. It’s one of the leading causes of death in the world, killing an estimated 500,000 people globally, according to the World Health Organization, according to RT.

Rosetta's missing Philae probe found in dark crack on comet

High-resolution cameras on the European Space Agency's (ESA) Rosetta spacecraft have found space probe Philae, which landed on a comet nearly two years ago only to lose power because its solar-driven batteries were in the shade.

Images taken from Rosetta at a distance of 2.7 km (1.7 miles) showed Philae wedged into a dark crack on Comet 67P/Churyumov–Gerasimenko, the ESA said, according to Reuters.

Philae landed on the comet in November 2014 in what was considered a remarkable feat of precision space travel but the metre-sized, 100 kg (220 lb) probe bounced several times before getting stuck against a cliff wall.

Giant pandas rebound off endangered list

He giant panda is no longer an endangered species, following decades of work by conservationists to save it.

The official status of the much-loved animal has been changed from "endangered" to "vulnerable" because of a population rebound in China, according to BBC.

The change was announced as part of an update to the International Union for Conservation of Nature (IUCN) Red List.

But the update also brought bad news. The eastern gorilla, the world's largest primate, is now endangered.