Could you tie a series of square knots around the neck of a teaspoon without, even slightly, moving the teaspoon? How about using tweezers to extract a grape from inside a roll of toilet paper, without piercing the grape’s skin or touching the sides of the roll? Aspiring surgeons should have the …
Source : https://www.nytimes.com/2019/05/30/well/live/surge...
Source : https://www.nytimes.com/2019/05/30/well/live/surge...