A single nuclear weapon can destroy a city and kill most of its people. Several nuclear explosions over modern cities would kill tens of millions of people. Casualties from a major nuclear war between the US and Russia would reach hundreds of millions. Your browser can't play this video.
10 Safest Countries That Will Survive Nuclear War
In a limited nuclear war, perhaps “only” a few cities would be incinerated, not enough to bring societies to a halt. Even a full-scale nuclear war would most likely leave many human survivors — billions of them.
Since I do not foresee that atomic energy is to be a great boon for a long time, I have to say that for the present it is a menace. Perhaps it is well that it should be. It may intimidate the human race into bringing order into its international affairs, which, without the pressure of fear, it would not do.
Russia and the United States together possess nearly 90% of the world's nuclear weapons, with Russia holding the largest total stockpile and the U.S. having a substantial number of deployed strategic warheads, making them the dominant nuclear powers by far, despite other nations like China, the UK, France, India, Pakistan, Israel, and North Korea also having nuclear arsenals.
Russia has the most confirmed nuclear weapons, with over 5,500 nuclear warheads. The United States follows behind with 5,044 nuclear weapons, hosted in the US and 5 other nations: Turkey, Italy, Belgium, Germany and the Netherlands.
Oppenheimer's Iq of 135 places him in the 99th percentile of intelligence, while Einstein's estimated Iq is 160, in the genius category. The Iq test oversimplifies intelligence, missing out on factors like creativity and emotional intelligence pivotal for Oppenheimer and Einstein.
“I don't know what weapons World War III will be fought with, but World War IV will be fought with sticks and stones.”
My part in it was quite indirect.” In an interview with Newsweek magazine, he said, “Had I known that the Germans would not succeed in developing an atomic bomb, I would have done nothing,” meaning that he came to regret writing his letter to the President.
Heavy clothing and even the outer layers of the skin prevent internal damage from alpha and beta radiation types (along with a respirator to prevent inhalation).
The "two-man rule" in nuclear operations is a security protocol requiring at least two authorized, trained personnel to be present and cooperate to perform critical tasks, like accessing or launching nuclear weapons, preventing any single person from acting alone to prevent accidental or unauthorized use, often involving separate keys, codes, or physical actions for each person. This system ensures checks and balances, seen in missile silo crews turning separate keys or submarines requiring dual authentication, creating a fail-safe against individual error or malice.
Is it possible to outrun the shockwave from nuke in a car if you're no where near the centre of blast radius? No. The minimum speed of a blast wave is the speed of sound. The real speed, of course, will be higher.
A 1-megaton explosion can cause flash blindness at distances as great as 13 miles on a clear day, or 53 miles on a clear night. If the intensity is great enough, a permanent retinal burn will result.
Iceland is consistently ranked as the #1 safest country in the world by the Global Peace Index (GPI), a position it has held for over a decade due to extremely low crime, no standing army, high social cohesion, and minimal conflict, though some other reports might place Switzerland or the Netherlands first based on different survey criteria.
IT'S NOT just cockroaches. Lots of invertebrates will do rather well. Scorpions, for example, are so effective at relecting radiation that they glow when you shine an ultra-violet light on them. They would laugh off a nuclear winter, too.
If World War 3 started, it would likely involve major global powers, potentially escalate rapidly due to advanced technology (including nuclear weapons), and cause immense destruction, leading to massive loss of life, economic collapse, societal breakdown, and long-term environmental impacts like nuclear winter, with some predicting human extinction or a drastically altered, struggling civilization. Even a non-nuclear WW3 would devastate global systems, causing widespread panic, resource shortages, and protracted conflicts.
Hungarian refugees Leo Szilard, Eugene Wigner, and Edward Teller persuaded Einstein to warn President Franklin D. Roosevelt about the possibility that Germany could develop an atomic bomb, and to urge FDR to consider a similar program in the United States.
Various conflicts, most significantly the Russo-Ukrainian war (2022–present), the Middle Eastern crisis (2023–present), and rising tensions over the status of Taiwan, have been perceived as flashpoints for a third world war.
Stephen Hawking's "last warnings" focused on humanity's existential risks, urging us to become a multi-planetary species to survive threats like climate change, asteroids, and rogue artificial intelligence (AI). He warned that unchecked AI could surpass human intelligence, potentially replacing us, and emphasized the need to colonize other planets before Earth becomes uninhabitable due to self-inflicted or natural disasters, as detailed in his posthumous book Brief Answers to the Big Questions.
Stephen Hawking never officially revealed his IQ, and often dismissed the metric, famously saying, "People who boast about their IQ are losers". While estimates place his IQ around 160, a genius level, this is speculative; Hawking emphasized that creativity, persistence, and passion for science were more important than a single score, despite his profound impact on physics.
Maintaining the option of launching weapons on warning of an attack leads to rushed decision making. It would take a land- based missile about 30 minutes to fly between Russia and the United States; a submarine-based missile could strike in as little as 10 to 15 minutes after launch.
This is apparently a reference to capabilities that Russian missiles have but U.S. missiles do not—supersonic and hypersonic speed, very long range, dual capability, and, in many cases, antiship capability (until recently when the United States began to introduce longer-range antiship missiles).