Discover the world's most massive and expensive construction megaprojects currently underway. This video explores significant ...

While we may remember the "one small step" more than anything else, the first Lunar Rover has its own interesting story ...

The world is changing rapidly, with digital acceleration, climate volatility, demographic shifts, and economic uncertainties ...

The West’s most important river has shriveled over the past quarter century — and its leading climate scientist says things ...

But this raises questions about the future of TSA’s increasingly popular PreCheck program, since the shoes-off requirement and other restrictions for standard screening are exactly what PreCheck was ...