Pretend-play is a favorite pastime for American children. They mentally transform the here and now, preparing pretend meals in toy kitchens, frolicking around on fake horses, and feeding baby dolls with plastic bottles. By age 4, children spend approximately 20% of their waking hours engaged... click to read more

Obesity is an increasing problem worldwide. While even a modest reduction in weight can improve the health of overweight and obese people, and reduce the risk of developing associated diseases such as diabetes, cardiovascular disease, and cancer, most people have trouble losing weight by cutting... click to read more

Zika virus has been put in the spotlight after the large 2015 outbreak in Brazil. Infections have been seen in many other countries across the world, but so far there is no special treatment or vaccine available. Most of the people infected with Zika virus... click to read more

Our research team has determined the age of Homo naledi, a new species of hominin (human ancestor), from the Rising Star Cave in The Cradle of Humankind World Heritage Site, South Africa. We have also announced the discovery of a second chamber (the Lesedi Chamber)... click to read more

DNA is the core-element of life as we know it. It can be imagined as a long helical double strand composed of sequences of information written with four chemical "letters" called nucleotides. Determinate sequences of letters delineate stretches of DNA called genes, which in turn... click to read more