At least one-third of the species that inhabit the world's oceans may remain completely unknown to science.

ENGADGET: Scientists estimate at least one third of marine species remain unknown to humans

The rise in the private schools' proportion is in fact due to the abolition in the late 1970s of a third, hybrid species, the direct-grant school.

ECONOMIST: Will the government hobble Oxford and Cambridge?

And if it is happening because one third of the species is finally getting rich then the effects of that, while it may indeed raise the oil price, could be greater than the effects of the oil price rise.

FORBES: Peak or Plateau Oil, Oil Prices and Economic Growth

The Global Amphibian Assessment has warned that a third of the world's amphibian species are in danger of extinction, many because of the chytrid fungus.

BBC: NEWS | Science/Nature | Warming link to amphibian disease

From this year on, starting with Dolly the sheep, we do have proof there is a third subject which is able to develop species - that is human beings.

BBC: Should genetic engineering be stopped?

There is now compelling evidence that about a third of all African elephants belong to a newly defined species, Loxodonta cyclotis.

NPR: Lifting the Ivory Ban Called Premature

The difference in size was substantial: the spleens of the species in question were, on average, a third smaller in the birds that had been killed by cats than in those killed by accidents.

ECONOMIST: Survival of the fittest, and oldest

And about a third of ocean-going sharks appear on the internationally-recognised Red List of Threatened Species.

BBC: Cook Islands' shark sanctuary creates world's largest

The World Wide Fund for Nature says a third of the world's forests are under serious threat from climate change -- with dire implications for the species that live in them.

BBC: Special Report