Scientists in Australia discovers what they say is the largest asteroid impact area ever found

Scientists believe they may have found a new weapon in the fight against Alzheimer's disease -- not in the form of a drug but in focused beams of ultrasound

Scientists say new drug tested on monkeys provided astonishingly effective shield against animal version of AIDS, major gain in the quest for an HIV vaccine

Scientists say they have gained new insight into what lies at the very centre of the Earth