Maintaining this system of giant concrete arrows cost $28 million a year (adjusted for inflation). Before the highway of light it took 83 hours to get a letter across the US. After the system was ...

Ever notice those funky circles scattered about the landscape while flying over the central U.S.? Some call them crop circles, but it turns out they're something else entirely.

Skies across the northernmost US states could be graced with stunning displays of the Northern Lights on Friday, blown into view by a giant "hole ... to the Arctic Circle, but a forecast from ...