A study suggests that competition from other marine mammals might be bigger problem for a small group of killer whales.
21 Nov 2017 1:58 PM
It’s thought to be about a quarter-mile long, and about 10 times longer than it is wide.
21 Nov 2017 1:03 PM
Mars theory gets dusted; a new study suggests that dark streaks on Mars represent flowing sand - not water.
21 Nov 2017 9:25 AM
South Africa led the world with the number of people on treatment, at 4.2 million.
21 Nov 2017 1:14 AM