Clark is an English language surname, ultimately derived from the Latin with historical links to England, Scotland, and Ireland clericus meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educated.

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George Clark, astrophysicist who led discoveries of celestial gamma-ray sources, dies aged 94

Northrop Grumman names cargo craft for fallen Columbia astronaut Laurel Clark

Percival Lowell studied planets through the 24 inch Clark telescope and announced his discovery of canals and oases on Mars in 1894, which no other astronomers saw. Lowell used this telescope for the rest of his life and sketched Venus, despite the fact that it has no visible surface features

Following Lewis and Clark’s Trail of Mercurial Laxatives