NASA engineers have finished testing a new ion-propulsion system for earth-orbiting and interplanetary spacecraft. The system is more powerful and fuel-efficient than its predecessors, enabling it to travel farther than ever before.

The cost of a personal genome has dropped from about the price of a luxury sedan to, well, the price of a slightly less luxurious nice car. Illumina, a genomics technology company headquartered in San Diego, announced the launch of a $48,000...

British scientists will use pig eggs and DNA from a human patient with heart disease to generate stem cells. If successful, these will be the first human stem cells made from animal eggs.

Materials that change temperature in response to electric fields could keep computers--and kitchen fridges--cool.

In California last week, Chinese researchers unveiled details of a microprocessor that they hope will bring personal computing to most ordinary people in China by 2010.