Tear-free brushing? All you need is math - Phys.org

As anyone who has ever had to brush long hair knows, knots are a nightmare. But with enough experience, most learn the tricks of detangling with the least amount of pain—start at the bottom, work your way up to the scalp with short, gentle brushes, and apply …

As anyone who has ever had to brush long hair knows, knots are a nightmare. But with enough experience, most learn the tricks of detangling with the least amount of painstart at the bottom, work your… [+2980 chars]

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