Another was packed two layers deep with science-fiction paperbacks.

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For Fuchs' dystrophy, an increasingly common procedure replaces only the deep layers of the cornea, including the endothelium.

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The permafrost underneath those trees is melting, exposing deep layers of peat soil that has locked away carbon for thousands of years.

NPR: Stronger Wildfires Part of Emerging Global Pattern

Imaging through rock is one thing, but seismic data get scrambled when it bounces off layers of salt deep under the seabed.

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Although methane itself is not regulated as a water pollutant, the study could lead to federal regulation of the heretofore largely unregulated practice of the hydraulic fracturing, or fracking, of deep layers of shale to tap vast reservoirs of natural gas in the United States.

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As a result, the makers have developed a generation of cells whose silicon layers are only a micron or two deep, as opposed to the usual thickness of 200-300 microns.

ECONOMIST: Solar energy

Scans conducted after layers of bandages were removed revealed a deep cut in Ramesses III's throat, probably made by a sharp knife during a royal coup, according to a study published by the British Medical Journal.

CNN: Study revisits mystery of Egyptian king's killing

The installation, currently housed at the New York Hall of Science in Flushing, layers 12 of its component clear plastic sheets to create a roughly one-foot deep display that plays a simple pre-drawn animation.

ENGADGET: Crayolascope hacks toys into foot-thick 3D display Alt

Deep-learning software tries to emulate, albeit in a still primitive way, the activity in layers of neurons in the neocortex, the part of the human brain where thinking occurs.

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