Retro Report chronicles the continuing development of the artificial heart. Today, the life-saving device serves as a stopgap while patients wait for a donor heart, but experts continue to work on a surrogate heart that can be used permanently.
Veritasium breaks down the most requested cosmetic procedure. The melanin in our hair (and skin) protect us by absorbing light. Laser hair removal takes advantage of that by overloading hair with short bursts of heat, enough to damage the cells that produce hair.
The so-called war on drugs is about short term gains and check marks for politicians. It goes after suppliers, but drugs are addictive. Users are willing to pay high prices for drugs, which encourages suppliers. The solution is to alleviate the demand for these substances.