Brian Cox - What Caused The Big Bang?

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Brian Cox - What Caused The Big Bang? Ever pondered the enigma of the universe's inception? Join Brian Cox and Brian Greene in a captivating exploration of the Big Bang's mysteries. This journey takes us 14 billion years back, to a time when all matter and energy were compressed into an infinitesimal point, destined to expand and create the cosmos we know today. This video delves into the depths of cosmology, challenging the boundaries of our understanding of physics. Discover the nuances of time's creation, the nature of the universe at T equals 0, and the emergence of time and space as we comprehend them. We examine the universe's expansion and cooling, leading to the formation of the first particles and atoms, culminating in the cosmic microwave background radiation – a testament to this colossal event. But the intrigue deepens. What existed at T equals 0? Was there a 'before' the Big Bang? Our experts analyze theories like quantum fluctuations, where the vacuum of space teems with energy, potentially sparking the Big Bang. The multiverse theory, string theory's branes collision, and cosmic inflation are also scrutinized, offering diverse perspectives on our universe's birth. This video isn't just about seeking answers but understanding the questions themselves. We shift from asking 'why' to probing 'how' – how conditions aligned for the universe's birth, how physical laws and randomness intertwined to birth our cosmos. Dive into a universe so dense that it's beyond imagination, where concepts like 'repulsive gravity' challenge our very understanding of cosmic forces. This journey through the Big Bang's aftermath isn't just a scientific exploration; it's an invitation to marvel at the cosmos's vast complexities and mysteries Subscribe to Science Time: https://www.youtube.com/sciencetime24 #briancox #briangreene #bigbang

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00:18:01

The True Scale Of Modern Nuclear Weapons

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,The terrifying true scale of modern nuclear weapons is beyond what most people can imagine. Nuclear Weapons today are far more powerful than those used in World War II. For example, the B83 nuclear bomb, the largest in the U.S. arsenal, is 80 times more powerful than the bomb dropped on Hiroshima. This single Nuclear Weapon could destroy an entire city like Beijing, causing millions of deaths and injuries. Submarine-launched missiles like the Trident II carry multiple Nuclear Weapons. Each missile can deliver up to eight warheads, each 30 times more powerful than the Hiroshima bomb. A single Trident II could devastate a city like Moscow, resulting in over 2.8 million immediate fatalities. China's Dongfeng 5 missile is another example of the terrifying power of Nuclear Weapons. It can carry up to 12 warheads, each 66 times more powerful than the Hiroshima bomb. If aimed at a city like Washington, D.C., the impact would be catastrophic, with over a million fatalities. Russia's R-36 missile, known as the "Satan" missile, can carry multiple Nuclear Weapons with immense destructive power. Some versions can deliver a single warhead up to 20 megatons, which is over 1,300 times the Hiroshima bomb. At the top of the list is Russia's RS-28 Sarmat missile, nicknamed "Satan 2." This Nuclear Weapon can carry up to 15 warheads and potentially deliver a 50-megaton bomb, causing unimaginable destruction to cities like New York. Even though some countries may face setbacks, the existence of these Nuclear Weapons means that even a few could cause unimaginable damage. The true scale of modern Nuclear Weapons shows that in a nuclear war, there are no winners—only devastating loss for humanity. Sources: https://nuclearsecrecy.com/nukemap/ U.S. Department of Energy https://www.energy.gov/ National Museum of the U.S. Air Force https://www.nationalmuseum.af.mil/ https://en.wikipedia.org/wiki/Nuclear_weapon Subscribe to Science Time: https://www.youtube.com/sciencetime24 #nukes #sciencetime #nuclearwinter

00:12:05

Why It's Impossible To Escape North Korea

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00:11:44

These Are The Events That Will Happen Before 2045 (Singularity)

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,These are the events that will happen before 2045. If we don't blow ourselves up, if an asteroid doesn't strike us down, if a virus doesn't eradicate the human species, or if any other catastrophic event, whether manmade or natural, doesn't occur, it's extremely likely that technological progress will not only continue, but accelerate. What will life be like, in 2045? "Prediction is very difficult, especially, if it's about the future." This quote, often attributed to Niels Bohr, captures the essence of our challenge when trying to foresee the events that will happen before this seemingly arbitrary year. So, what's so special about 2045? Why not try predicting events in 2050, or 2100? In a post-AGI world, if humans are still part of it, it will most certainly mean we have solved the AI alignment problem. A machine capable of outmatching any human in intelligence will create the blueprint for the machine that makes the next machine to achieve any of its goals. Automation will skyrocket, leading to what is called a "post-work society," where machines perform every mundane and even intellectual task. Any existing job will be performed much better by a machine, potentially leading to widespread unemployment. Even intellectual tasks will be outstripped by AI. Obviously, such an intelligent AGI will also be used for good, such as solving complex societal problems like disease. But even if we solve the AI alignment problem, our current political system will need drastic changes to counter the effects of a few companies owning AGI, creating trillions of dollars in wealth while the rest of society is left to starve. A sort of wealth redistribution system, perhaps even devised by AGI, will need to be enacted to address every job being lost to machines. But even if this political system problem is solved, some critics argue that this would create a false Utopia, as many of the now 8 billion-plus free of disease tourists who play Frisbie all the time, still find meaning in their work. Subscribe to Science Time: https://www.youtube.com/sciencetime24 #AI #sciencetime #AGI