A study of 9000 subjects found that replacing animal fat with vegetable oil failed to reduce heart attacks.

Iranian presidential candidate Mehdi Karroubi, held under arrest since his last defeat, accuses the state of rigging the elections.

Bleaching now affects half of the Great Barrier Reef.

Coral animals often die after bleaching. In the more equatorial parts of the Great Barrier Reef, half of them are dead.

Australian scientists are trying to breed a replacement coral that could survive higher temperatures and higher acidity.

Bravo to them, but supposing if that effort succeeds, it won't avoid disaster. 400 known species of coral that live in the Great Barrier Reef; there may be others as yet unknown to science. Losing all but one, or all but a few, would still be disaster.

Maybe the world needs a global body to decide international tax policy.

Such a body might be helpful, but the idea does not get to the root of the matter. The article assumes that this issue is a clash between "national interests" of the poor countries and the rich countries, and that each governments involved is trying to serve the national interest of its country.

As we know, that's not always true. In particular, most governments of rich countries nowadays typically serve the interests of plutocrats rather than the interest of the country overall. If these governments tried to truly serve their own national interests, they would clamp down on tax dodging just as the poor countries would want them to.

The Cameron family tax-dodging strips bare the Tories' claim that the sacrifices they impose on poor Britons are for the country. Now no one can avoid seeing that those sacrifices are for the tax dodgers.