That is, how did English gain the present status of popularity? There are in fact a number of interlocking reasons for the popularity of English as a lingua franca.
A new study reports that the planthopper Issus coleoptratus evolved a foolproof solution to this problem: in young nymphs of the species, the two legs meet under the belly in plates fringed with interlocking teeth.
They can hide their true identity in a maze of interlocking companies, or even use places such as the British Virgin Islands, where anonymity is legally protected.
In summer, many Sami are dispersed with the herds, living in laavo, their traditional tents made of woven wool stretched over an interlocking pyramid of birch poles.
But the Maeslantkering is just one part of a massive, interlocking system of water controls known as the Delta Works — the most sophisticated flood prevention project in the world.
The teeth are interlocking, in fact, this tooth which I have of a related sperm whale shows where the opposite tooth came right down here and occluded against this crown.