Origin of Stonehenge’s altar remains enigma as north-east Scotland theory ruled out

Geologists say they are getting closer to solving mystery as tests suggest stone may have come from elsewhere in Scotland, northern England or even Ireland They spent countless hours on weather-battered Scottish hills, a hardy band of geologists searching for the origin of one of Stonehenge’s most intriguing features.

But the prehistoric monument tends to yield its secrets reluctantly, and a new scientific report…