Our ship docked in Halong Bay, and I've had a lot of recent coverage because of our  Diamond Princess cruise through this area , so I will today focus on Fusion, the greatest hope for sustainable energy into the long-term future,  Today, only a history. There are two kinds of nuclear reactions. Fission:  splitting a heavy nuclei, like Uranium.  An Atomic Bomb gets energy from fission. Fusion:  joining light nuclei, like, like isotopes of Hydrogen, Deuterium and Tritium.  A Hydrogen Bomb uses fusion. Some  fusion history . In 1920, British physicist Francis Aston discovered that the mass of four hydrogen atoms is greater than the mass of one helium atom, which implied that energy can be released by combing hydrogen atoms to form helium. This concept provided the first hints of how stars produced energy. Henry Russell observed that a star's heat came from a hot core rather than the entire star. Mark Oliphant, working with Ernest Rutherford and oth...

  Atomic Bombs   were exploded over Hiroshima ( right ) and Nagasaki to end World War 2. Nagasaki's Fat Man was 40% more powerful than Hiroshima's Little Boy.  The Tsar Bomba of the Soviet Union, a hydrogen bomb, was 3500 times more powerful than Fat Man. Watch this fascinating  video of how much destruction these weapons would cause . Comparison with other bombs, height of Mount Everest and altitude of commercial airliner. It is reported, that Soviet scientists were worried about this H-Bomb being, perhaps, too powerful, so they decided to limit the size to 50 Megatons, but instead got 57 MT of TNT.  They could have brought it up to more than 100 MT. Can a more powerful bomb be built?  Yes, an  anti-matter bomb.  Watch this video. Theoretically, should be 100 times more powerful than a Tsar Bomba. Just half a gram of anti-matter reacting with half a gram of ordinary matter would produce the equivalent of the Nagasaki A-Bomb. A ton of anti-matter ...