Do you like to keep your fingernails and toenails aesthetically pleasing? You could be putting yourself at risk of serious nail conditions, say researchers at the University of Nottingham who have devised equations to identify the physical laws that govern nail growth and used them to throw light on the causes of some of the most common nail problems, such as ingrown toe nails, spoon-shaped nails and pincer nails.

Writing in Physical Biology, they note that regular poor trimming can tip the fine balance of nails, causing residual stress to occur across the entire nail. That residual stress can promote a change in shape or curvature of the nail over time which, in turn, can lead to serious nail conditions.

A study of Samoan volcano hotspots has found evidence of the planet's early formation still trapped inside the Earth.

Volcanic island chains such as Samoa can contain ancient primordial signatures from the early solar system that have survived for billions of years. To make their determination, the researchers utilized high-precision lead and helium isotope measurements to unravel the chemical composition and geometry of the deep mantle plume feeding Samoa's volcanoes. 

In most cases, volcanoes are located at the point where two tectonic plates meet, and are created when those plates collide or diverge. Hotspot volcanoes, however, are not located at plate boundaries but rather represent the anomalous melting in the interior of the plates.

On April 23rd, 2014, NASA's Swift satellite detected the strongest, hottest, and longest-lasting sequence of stellar flares ever seen from a red dwarf star - 10,000 times more powerful than the largest solar flare ever recorded.

'Just produced' in the title is cosmologically speaking -  the "superflare" came from one of the stars in a close binary system known as DG Canum Venaticorum (DG CVn), which is 60 light-years away. Both stars are dim red dwarfs with masses and sizes about one-third of our sun's. They orbit each other at about three times Earth's average distance from the sun, which is too close for Swift to determine which star erupted. 

It sounds a little trampy to humans but in nature, it's not unusual for a female to copulate with several males in quick succession. Chimpanzees are a well-known example.  

When that happens, sperm war breaks out.

"The sperm of the different males then compete within the female to fertilize the eggs," says   evolutionary biologist Steven Ramm from Bielefeld University. "Generally speaking, the best sperm wins. This may involve its speed or also be due to the amount of sperm transferred. It can also be useful for the seminal fluid to be viscous, meaning it sticks inside the female reproductive tract to try to keep other sperm at bay."

A paper in the International Journal of Web-Based Communities suggests that the familiar interfaces of online social networking sites might be adapted to allow us to interact more efficiently with our networked devices such as cars, domestic appliances and gadgets.

The concept would also extend to the idea of those devices connecting with each other as necessary to improve efficiency of heating and lighting, make our home entertainment systems smarter and much more.