Scientists in China say they have successfully grown a human tooth using stem cells taken from urine.
Researchers say the technique could one day be used as a way to replace teeth lost through aging and poor dental hygiene, with the added bonus that urine is deemed a less controversial source of stem cells than human embryos.
A recent study led by Megan Thoemmes and Rob Dunn from North Carolina State University in the US looked at a small sample of American adults and confirmed what had long been assumed - that 100% of them had mites living on their faces.
Nothing says "I'm single and ready to mingle" like a dose of salty digestive fluid. For sea lampreys, anyway.
Male sea lampreys use a type of bile salt, which is more typically known for digesting fats, to advertise their genetic fitness to females and readiness to mate, new research shows. This stands in contrast to silver lampreys, which use the enzyme for digestion and other nonsexual functions, said Weiming Li, a researcher at Michigan State University.