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Cataract extraction. The procedure involves a surgical removal of a cataract lens and its replacemen
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
The injector on-time is called the pulse width.
The illusory bands visible in this figure are often called Mach bands, although Mach used a ...
A Gaucher cell showing accumulated fat stored in structures called lysosomes