Tag Archives: oddities

Un-Bear-able

Arctic pollution causing polar bears to change sex
By Charles Arthur

Polar bears, Arctic foxes and Inuit peoples are under threat from man-made toxins such as polychlorinated byphenyls (PCBs) that build up in the food chain, new research reveals.

Environmental and animal groups are calling for a global ban on the production of the chemicals to safeguard the future health of those groups. Some scientists believe the PCBs are leading to “gender-bender” polar bears in Norway and Greenland, after the discovery of a number of female bears which had both male and female sexual organs.

Move Over Fiber Optics

Speed of light broken with basic lab kit

Electrons usually travel at about two-thirds of light speed in wires, slowed down as they bump into atoms. Hache says it may be possible to send usable electrical signals to near light speed.

Scientists have sent light signals at faster-than-light speeds over the distances of a few metres for the last two decades – but only with the aid of complicated, expensive equipment. Now physicists at Middle Tennessee State University have broken that speed limit over distances of nearly 120 metres, using off-the-shelf equipment costing just $500.