But in the repeated curve of her thigh and calf he saw shapes like sea shells, with the luminescence and faint muscular rays of the great chambered nautilus.

ECONOMIST: Charis Wilson

Bertoni, as far as I know, is a kind of hippie who lives by the sea collecting shells and seaweed.

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When you take into account the ease with which they inhabit the ocean, free dive to depths of 15m or more, hold their breath for minutes, hunt for turtles, shells and sea cucumbers, and navigate between distant islands, led only by instinct, both names are equally fitting.

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Organisms that make shells or have skeletons that are exposed to seawater, such as clams, snails and sea butterflies, could see their shells dissolve in water that is too acidic.

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They did this through measurements of magnesium content in the shells of microscopic sea surface animals found in ocean sediment.

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The researchers looked at variations in oxygen levels in the shells of tiny sea creatures found in samples taken from the world's ocean beds.

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The novel is further lifted by moments of joy fly fishing with Sanderson, collecting shells on the sea shore and the pleasures of art, literature and film.

ECONOMIST: Exploring knowledge and self-knowledge

The sea would not become so acidic that shells would actually dissolve, but the extra acidity would mean making them was harder work, which might upset the oceanic ecosystem quite badly.

ECONOMIST: Global warming

During warm interglacial periods, when there may have been no sea-ice at all, an abundance of marine organisms would have left behind fossilised shells.

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State Wildlife Officers are firing salvos of firecracker shells, rubber bullets, and underwater charges to drive off a herd of about a hundred sea lions.

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