The exposed cliffs and slopes, devoid of plant life, clearly show the layers of rock and soil that have made this region such a geological playground.

BBC: Utah��s astonishing wild side

And that means great APIs to access the map, a way to put layers over the map to show important things, and a way to crowdsource new information.

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The results show the Peking Man fossils came from ground layers that were 680, 000-780, 000 years old, making them about 200, 000 years older than had previously been believed.

BBC: 'Peking Man' older than thought

"There are a lot of layers to the way I experience the show at this point, " he says.

WSJ: Songwriter Jason Robert Brown revisits tough times

In recent months, an army of contractors, suppliers and other volunteers have peeled off layers of old paint and dated wallpaper and ripped up grimy carpet in anticipation of the show house, which was held this month.

WSJ: Designer Show Houses: An Open House��For 10,000 People

Spam might show up in my inbox a few times each week, while I need to remember to check several layers of junk mail filters for false positives legitimate email marked as spam by an aggressive filter.

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