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The tax would apply to all kinds of trading, but estimates of how much revenue it might raise vary greatly.
The split dates from when Christianity first spread through the Roman Empire. Friday's meeting between Pope Francis and Patriarch Kirill is the culmination of longstanding efforts to promote dialogue.
The Nevada rancher's arrest is a setback for his self-styled militia supporters and their anti-federal lands fight. The charges stem from a standoff with federal agents at his ranch in 2014.
Some of the genetic variations in human DNA that have been linked to quick clotting or depression or diabetes lie within or near the genetic stretches we picked up from Neanderthals, a study finds.