What's the biggest atomic bomb to ever exist?
47628#15
The power of large bombs is typically measured in kilotons (kt) or megatons of TNT (Mt). The most powerful bombs ever used in combat were the two atomic bombs dropped by the United States to attack Hiroshima and Nagasaki, and the most powerful ever tested was the Tsar Bomba. The most powerful non-nuclear bomb is Russian "Father of All Bombs" (officially Aviation Thermobaric Bomb of Increased Power (ATBIP)) followed by the United States Air Force's MOAB (officially Massive Ordnance Air Blast, or more commonly known as the "Mother of All Bombs").
Bomb
448716#26
According to Truman's "Memoirs: Years of Decisions" (1955), Leahy had stated in 1945 to President Truman: "That is the biggest fool thing we have ever done. The atomic bomb will never go off, and I speak as an expert in explosives." Once the bomb was tested, Leahy became strongly opposed to its use in Hiroshima and Nagasaki. In his own memoirs, Leahy wrote:
William D. Leahy
9592#25
Then, in 1885, Flood Rock, a reef that Newton had begun to undermine even before starting on Hallert's Rock, removing of rock from the reef, was blown up as well, with Civil War General Philip Sheridan and abolitionist Henry Ward Beecher among those in attendance, and Newton's daughter once more setting off the blast, the biggest ever to that date, and reportedly the largest man-made explosion until the advent of the atomic bomb although the detonation at the Battle of Messines in 1917 was several times larger. Two years later, plans were in place to dredge Hell Gate to a consistent depth of .
East River
406804#43
One of the largest individual pieces ever found was an unexploded 'Tallboy' bomb uncovered in the Sorpe Dam in 1958.
In 2011, a 1.8-tonne RAF bomb from the Second World War was uncovered in Koblenz on the bottom of the Rhine River after a prolonged drought. It caused the evacuation of 45,000 people from the city and was then called "the biggest bomb-related evacuation in Germany's post-war history". In May 2015, Some 20,000 people had to leave their homes in Cologne in order to defuse a one-tonne bomb.
Unexploded ordnance
57003#21
From 1946 to 1958, the early years of the Cold War, the United States tested 67 nuclear weapons at its Pacific Proving Grounds located in the Marshall Islands, including the largest atmospheric nuclear test ever conducted by the U.S., code named Castle Bravo. "The bombs had a total yield of 108,496 kilotons, over 7,200 times more powerful than the atomic weapons used during World War II." With the 1952 test of the first U.S. hydrogen bomb, code named "Ivy Mike," the island of Elugelab in the Enewetak atoll was destroyed. In 1956, the United States Atomic Energy Commission regarded the Marshall Islands as "by far the most contaminated place in the world."
History of the Marshall Islands
41705554#6
Years after the Civil War, Allan sells the pistol to buy a work permit to travel to America. When informed that the worlds biggest bomb is being assembled, Allan's passion for explosions is re-ignited and he helps Robert Oppenheimer (Philip Rosch) in successfully developing the atomic bomb. For his work, Allan receiving praise from Harry S. Truman (Kerry Shale) for 'building a bomb that will stop all wars'. During a drunken dinner, Truman is informed by telephone that Franklin Delano Roosevelt, then President of the United States, has died, Truman being immediately sworn in as President.
The Hundred-Year-Old Man Who Climbed Out of the Window and Disappeared (film)
53975049#3
Edward Teller’s autobiography "Memoirs" reflects positively on Cohen and Urey's centrifuge method for producing U-235 when he writes: “What if we had the atomic bomb a year earlier? The easiest and least expensive method of separating isotopes, a method used throughout the world today, is based on a centrifuge procedure that Harold Urey proposed in 1940. General Groves chose the diffusion method instead. Karl Cohen, Urey’s able assistant during that period, believes that Groves’ decision delayed the atomic bomb by a year.
“If Dr. Cohen is right, atomic bombs of the simple gun design might have become available in the summer of 1944 and, in that case, would surely have been used against the Nazis. Atomic bombs in 1944 might have meant that millions of Jews would not have died, and that Eastern Europe would have been spared more than four decades of Soviet domination.”
Karl P. Cohen
1673949#13
While "Gilda" was in release, it was widely reported that an atomic bomb to be tested at Bikini Atoll in the Pacific Ocean's Marshall Islands would bear an image of Hayworth, a reference to her bombshell status. 
The fourth atomic bomb ever to be detonated was decorated with a photograph of Hayworth cut from the June 1946 issue of "Esquire" magazine. Above it was stenciled the device's nickname, "Gilda", in two-inch black letters. Although the gesture was undoubtedly meant as a compliment, Hayworth was deeply offended. Orson Welles, then married to Hayworth, recalled her anger in an interview with biographer Barbara Leaming:
Gilda
30656#12
The biggest hydrogen bomb ever exploded, the Tsar Bomba, was around 50 megatons.
The 1883 eruption of Krakatoa was the equivalent of roughly 200 megatons.
Torino scale
11765839#27
The quark bomb explodes at the moment of construction at the factory. The rest of its existence is a slow process of quark fission, which turns the avalanche-like destruction of atoms into a slow, rhythmical, gradual destruction of 10 grams of copper dust - the best known explosive trigger. If the bomb is shot at, which destroys its mechanisms, then the unstoppable process of atomic fission begins at full strength. The only way to get rid of a quark bomb is to jettison it in deep space at least 3-4 light years from the nearest stellar body or nebula. Occasionally, quark fission can be transferred from one planet to another through tiny meteorites, dust particles, molecules of ionized gas, etc.
A Lord from Planet Earth