Smart helicopter thanks to active rotor blades

Active systems in helicopter rotor blades can adapt the blades' aerodynamic properties to local airflow conditions. The use of such systems leads to lower fuel consumption, increased maximum speed and reduced noise and vibration. ...

Study identifies four family cultures in America

(Phys.org)—Four types of family cultures – the Faithful, the Engaged Progressives, the Detached and the American Dreamers – are molding the next generation of Americans, a three-year study by the University of Virginia's ...

Kenyan ranches relocating rhinos in fear of poachers

Claus Mortensen is a private Kenyan rancher with a passion -- endangered rhinos -- and now a mission: to save his herd from slaughter by ruthless poachers who sell their horns to Asia, where they are prized as a miracle drug.

Lack of free play among children is causing harm, say experts

Hovering helicopter parents who restrict their kids' unstructured play may actually harm, rather than help, children according to the latest issue of the American Journal of Play, a scholarly journal which has gathered a ...

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