Earth & Environment

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layer sediment

CLIMATE CONTROL  Studies of sediment layers in an ancient Italian lake suggest that carbon emissions from human activities may be delaying the start of Earth’s next glaciation. Volcanic ash forms the darker bands in the rock, which researchers used to date an ancient warm period.

dead dolphin

DOLPHIN DEATH  Scientists have linked toxic effects of oil spilled in the 2010 Deepwater Horizon disaster to an ongoing surge in stranded and dead dolphins, such as this one, along the Gulf of Mexico coast.

carbon sink

UP IN THE AIR  Semiarid regions, like this area in Central Australia, may be responsible for the wild variations in the amount of CO2 left free in the atmosphere to warm the planet.

Earth & Environment

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