Developed in the 1970’s, Ground Penetrating Radar (GPR) uses radio waves to detect and map underground objects and soil/rock strata. In the last three decades archaeologists have made extensive use of the technology. It allows them to detect, map and analyze archaeological remains without putting a shovel into the ground.

How it works

The science behind GPR is complex and has been the source of plenty of headaches for archaeology students. A very basic explanation of the technology works like this:

The antenna of a GPR system shoots radio pulses into the ground. Each pulse travels through the ground as a wave.

Within the ground there are different layers of subsurface materials (soils, rocks and, hopefully, archaeological remains).

Every time this wave comes in contact with a new layer of soil or debris, the velocity of the wave changes. This causes some of the energy of the wave to “bounce” back as a reflected wave.

BRITAIN’S oldest large-scale example of sophisticated medieval wooden architecture has been discovered – buried 12ft deep in a gravel pit in Leicestershire.

Now, after four weeks digging, the substantial remains of a great medieval timber bridge have emerged. Dating work on the timbers – conducted by the University of Nottingham tree ring dating laboratory – show that the bridge was constructed in the late 11th century, at about the time of the Domesday Book.

About 25 per cent of the bridge’s timbers have survived, including Britain’s earliest known large-scale examples of sophisticated carpentry. The structure is 30 to 40 yards long, 10ft wide and was built using at least eight different types of lap and butt joints.

Some other masterpieces of Russian medieval wooden architecture were found abandoned.

Some of them look like they are just left – even some furniture stays on its places. The reason they are so undisturbed – it stays deep inside the Russian forests.

Dust clogs the vents behind your computer, which causes your CPU to heat up—and heat is the biggest cause of component failure in computers. Regular cleaning could save you costly maintenance fees down the road.

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Cloaked by time’s leafy shroud, the prehistoric settlement of Gaer Fawr lies all but invisible beneath a forest in the lush Welsh countryside.

Commanded by warrior chiefs who loomed over the everyday lives of their people, the massive Iron Age fortress once dominated the landscape.

Now the 2,900-year-old structure lives again, thanks to a digital recreation following a painstaking survey by the Royal Commission on the Ancient and Historical Monuments of Wales.

The Iron Age hill fort in central Wales was a major feat of civil engineering, researchers say.