Which ground-based telescopes are explicitly identified as the most scientifically productive optical and infrared telescopes globally?

Answer

The W. M. Keck Observatory twins.

The Keck twins operating on Maunakea in Hawaii are distinguished not only by their size but primarily by their operational history and scientific output, making them the most scientifically productive in this category.

Which ground-based telescopes are explicitly identified as the most scientifically productive optical and infrared telescopes globally?
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