America's Stonehenge: New Hampshire rocks history or hoax?

Using the astronomical chart on a table in the covered tower, visitors aim their gaze along worn arrows to huge, upright stones hundreds of feet away. Beyond each slab of granite, clearings stretch the eye to the horizon ...

How one US state went from two quakes a year to 585

The central US state of Oklahoma has gone from registering two earthquakes a year to nearly two a day and scientists point to a controversial culprit: wastewater injection wells used in fracking.