In Ancient Greek, one of the final two or three syllables of a word carries an accent. Each syllable may contain one or two vocalic morae, but only one can be accented; accented morae are pronounced at a higher pitch.
US military to launch fastest-ever plane. By the time you finish reading this sentence, the Falcon HTV-2, the fastest plane ever built, could have flown 18 miles. It would get from London to Sydney in less than an hour, while withstanding temperatures of almost 2,000C, hotter than the melting point of steel.
Image: Nasa. In a fascinating piece about the SR-71 Blackbird, the BBC calls it The Cold War's ultimate spy plane. The Blackbird is the world's fastest plane capable of speeds reaching 2,200mph (3,540kph) while its futuristic shape and black paint full of radar-absorbing iron made it virtually undetectable. The SR-71, built by Lockheed, served with the US Air Force from 1964 to 1998.