This video is about the 21 gram experiment performed by Duncan MacDougall in 1901 and the energy 21 grams of matter would render according to Einstein's mass-energy equivalence equation E=mc2. This energy is equal to 1.89 PJ. This video presents 4 parallels with real life of how this energy can be used for practical purposes. One example is how many lightning bolts would carry an energy equivalent to one human soul. Another parallel would be how long would the largest nuclear power plant in the world Kashiwazaki-Kariwa need to function at its full capacity in order to produce an energy equal to one human soul. Another interesting comparison would be for how long the energy of one human soul 1.89 PJ would ensure the electrical energy necessary of the entire world. Finally, in this video, it is calculated how many nuclear weapons such as those used against the Japanese cities of Hiroshima and Nagasaki would release the same amount of energy as one human soul. Hope you enjoy!