A man paralysed from the neck down by knife injuries sustained five years ago can now check his email, control a robot arm and even play computer games using the power of thought alone.
Researchers at the University of California, Irvine have devised a new method of Solar Sail propulsion that could make the trip from Earth to Mars in just one month.
The US military has begun development of an ultra-high speed weapons system that would enable targets virtually anywhere on Earth to be hit within two hours of launch from the continental US.