Tomb found of Mayan warrior queen

Archaeologists working in Guatemala say they've discovered the tomb of Lady K'abel, a seventh-century queen considered one of the greatest Mayan rulers.

Hand function returned to quadriplegic patient

Surgeons at Washington University School of Medicine in St. Louis have re-routed nerves in the upper arm to restore some hand function in a quadriplegic patient.

Google search ads pull in the best customers

Google search advertising costs around 80 cents a click - but brings in $10 per click, say researchers.

Computer controlled by thoughts alone

Washington University scientists have managed to connect people's  brains directly to a computer, allowing the computer to listen to their thoughts.