A global network of observation stations measures the round trip time of flight of ultrashort pulses of light to satellites equipped with retroreflectors.
powerful source of data for studies of the solid Earth and its ocean and atmospheric systems
the type of mountain is folded mountain
The answer is - To preserve the purity of the French language.
The original purpose of the French academy (formed in 1634, and incorporated in 1635) was to maintain standards of literary taste and to establish the literary language, thus preserving the purity of the French language and not allowing foreign influences in it. It was, and still is, one of the most prestigious academies.