Horn cam aims to safeguard rhinos

Rhinos wearing satellite-tracking collars with spy cameras implanted into their horns could help turn the tables on poachers, experts believe.

The system incorporates a video camera, GPS, and a 24-hour heart-rate monitor that triggers an alarm the moment a rhino is shot.

Poachers caught in the trap will have no time to escape as park rangers are helicoptered to the scene of the crime within minutes.