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The disappearance of Flight 19 is as much a mystery today as it was 80 years ago when it happened.

Long ago, in Arizona's canyons, a community built homes high above the ground. And their climb revealed lives of quiet brilliance, shaped as much by vision as by those canyon walls.

Every year the U.S. News & World Report put out their ranking of the "Best States to Live In"—And one of the factors they use to determine said ranking is a state's "Quality of Life".

Your bag met the carry-on rules, so you assumed it would go in the overhead bin. But then you get to the gate and are told it needs to fit under the seat. Not only that, but if it doesn’t fit, you’re going to have to pay to check it. So when did that become part of the rule?

Researchers have finally found the key ingredient that Roman concrete so strong and durable.

What caused North America's largest animals to vanish? This is a tale buried in permafrost and the clues are scattered across time. Thanks to a new scientific twist, we may be close to an answer.