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Here's how much the surgeries on My 600-Lb Life cost

My 600-lb Life is a TLC series featuring morbidly obese patients as they navigate the difficult and dangerous process of extreme weight loss.

Why you can’t tie knots in four dimensions

We can tie knots in three dimensions because one-dimensional ropes “catch on each other”. This is why a long rope wound around itself, if done right, won’t come apart. We trust knots with our lives ...