Australia on Saturday launched its 'Green Army' which plans to recruit up to 15,000 young people for projects to conserve and rehabilitate the environment -- the biggest land care mobilisation in the nation's history. 

A European probe approaching a comet in deep space has found the body's surface to be relatively warm, suggesting it has a mostly "dark, dusty crust," mission controllers said Friday.

Scientists have mapped how a group of fearsome, massive dinosaurs evolved and shrank to the likes of robins and hummingbirds.

Comparing fossils of 120 different species and 1,500 skeletal features, especially thigh bones, researchers constructed a detailed family tree for the class of two-legged meat-eaters called theropods. That suborder of dinos survives to this day as birds, however unrecognizable and improbable it sounds.

The game ranger with a rifle slung across his shoulders follows a bush trail through South Africa's famed Kruger national park, alert to the slightest sound or movement.

He faces threats not only from lions and elephants but from humans as well -- heavily-armed poachers who stalk the park's wilderness day and night.

Researchers have found a way to make see-through mice, but you won't find these critters scampering in your kitchen.

The transparent rodents aren't alive and they're for research only, to help scientists study fine details of anatomy.

The suite of space-age tools loaded on NASA's next robotic vehicle, bound for the Red Planet in 2020, will include a device for making oxygen out of carbon dioxide.

Pacific leaders warned Thursday that entire island nations will disappear under the waves unless action is taken to address climate change.

The Pacific Islands Forum (PIF) wrapped up its annual meeting in Palau with a call to action on the issue of global warming, with the 15-nation regional grouping saying there was no excuse not to act to curb climate change.

Thai Airways has banned shark fin from its cargo flights as part of a growing global campaign against the popular delicacy in Asia.

The carrier joins a host of other airlines in taking a stand against shark fin, highly prized by many in the region, especially in Hong Kong and China where it is commonly served as a soup at wedding banquets and corporate parties.

The Milky Way galaxy is lighter than previously thought, according to new research published by British-based scientists on Wednesday.

The study led by the University of Edinburgh is the first time that scientists have been able to measure accurately the mass of the galaxy that contains our solar system, the researchers said.

Far from being perfectly round, the Moon has a weird shape, with a highland bulge on the side facing the Earth and another bulge on its far side -- a riddle that has fascinated scientists for decades.

In theory, the Moon should be a nice sphere, sculpted by rotational forces since its creation some 4.4 billion years ago.