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 ...
Archaeology
Sep 20, 2015
0
315
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.
Earth Sciences
Sep 20, 2015
1
157
As elephant poaching in Africa by organised crime gangs using high-tech equipment rises, those working to stop their extinction in the wild have turned to technology too.
Other
Sep 20, 2015
0
101
