The self-taught artist Abraham Lincoln Walker worked in his basement on phantasmagorical paintings, discovered by the art world more than 30 years after his death.

Researchers found a hidden mathematical rule in tree-like art. Branch thickness follows a predictable ratio, making trees recognizable.

Background: Clinical trial designs have evolved due to changes in therapies, populations, and statistical methods. Objective: We aimed to analyze the designs of acute endovascular therapy trials in ...

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