Shatter cones are surface features with distinctive wavy patterns that are known to be created only by the tremendous force of a meteorite impact or an underground nuclear explosion.

MSN: Massive meteorite crater found in Canadian Arctic

Anyway, the hardware and software in the Joint Tactical Radio System must be designed to process each of these distinctive waveforms if it is to communicate with the hundreds of thousands of communications devices already in the force.

FORBES: New Radio Could Revolutionize Combat for U.S. Forces

Still structurally sound and with the potential to be converted for a number of uses, this distinctive building could show how ideas of sustainability and conservation can be brought together for the benefit of a city.

BBC: NEWS | UK | Magazine | Eyesore or gem: Gateshead car park

From the road, it can be seen entirely, from its shrubby base to its distinctive double peak, covered all year round with gleaming white snow.

BBC: A return to Middle-earth

Obama may be doing the same with Hillary Clinton -- offering her a prize through which she may yet secure a distinctive place in history and taking from her the chance to challenge him again if the 2010 midterm elections go bad for Obama.

CNN: Commentary: Clinton pick would be brilliant, but risky, move