Hong Kong to destroy almost 30 tonnes of ivory

Hong Kong said Thursday it would incinerate almost 30 tonnes of ivory seized from smugglers, in the world's largest such operation, following intense pressure from conservation groups.

Scientists identify a key to body's use of free calcium

Scientists at Johns Hopkins report they have figured out a key step in how "free" calcium—the kind not contained in bones—is managed in the body, a finding that could aid in the development of new treatments for a variety ...

Happy 10th anniversary Opportunity

Ten years ago, on Jan. 24, 2004, the Opportunity rover landed on a flat plain in the southern highlands of the planet Mars and rolled into an impact crater scientists didn't even know existed. The mission team, understandable ...

RX J1532.9+3021: Extreme power of black hole revealed

(Phys.org) —Astronomers have used NASA's Chandra X-ray Observatory and a suite of other telescopes to reveal one of the most powerful black holes known. The black hole has created enormous structures in the hot gas surrounding ...

Arab cyberactivism faces 'unprecedented attack'

Cyberactivists from the Arab world said Thursday they are facing "an unprecedented attack" from regimes in their countries, three years after the start of Internet-fuelled uprisings in the region.

Researchers identify key pathway for plant cell growth

For plants, the only way to grow is for cells to expand. Unlike animals, cell division in plants happens only within a tiny region of the root and stem apex, making cell expansion the critical path to increased stature.

Probing hydrogen catalyst assembly

Biochemical reactions sometimes have to handle dangerous things in a safe way. New work from researchers at UC Davis and Stanford University shows how cyanide and carbon monoxide are safely bound to an iron atom to construct ...

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