Why It's IMPOSSIBLE to Reach Any Alien Civilization | Brian Greene скачать в хорошем качестве

Why It's IMPOSSIBLE to Reach Any Alien Civilization | Brian Greene

We'll die before arrival. Physicist Brian Greene systematically proves why humans will never reach alien civilizations—not because of lack of ambition, but because physics, distance, energy, and time create insurmountable barriers that no technology can overcome. Discover why even nearest stars are unreachable: Alpha Centauri at 4.2 light-years requires 75,000 years at Voyager 1 speed (17 km/s), chemical rockets achieve 30-50 km/s (20,000-30,000 years travel time), nuclear pulse propulsion reaches 3-5% light speed (80-140 years), even optimistic antimatter rockets at 10-30% light speed take 14-42 years minimum—and most alien civilizations would be hundreds or thousands of light-years away requiring proportionally longer journeys. Learn why energy requirements are civilization-scale impossible: accelerating 1,000-ton spacecraft to 10% light speed requires 450 petajoules (10 million tons gasoline equivalent), reaching 50% light speed needs 50 years total human energy output, requires 300,000 kg antimatter when current production is nanograms per year at trillions per gram, storing antimatter safely for thousand-year journeys with perfect magnetic containment is impossible. Understand why timescales destroy missions: 500 light-year journey at 50% light speed takes 1,000 years travel plus 500 years signal return (1,500 years total), civilizations that launched mission will be extinct or unrecognizably transformed, destination civilization experiencing time 1,500 years after detection might be gone, institutional continuity across 1,500 years exceeds any human civilization's lifespan. Examine biological impossibility: humans need continuous life support for decades/centuries (never achieved closed-loop), radiation exposure over thousand-year journey causes severe cancer risk requiring massive shielding, psychological breakdown in isolation guaranteed, generation ships require stable multi-century social structures never demonstrated. Discover why finding civilizations impossible even with travel capability: must search thousands of stars before finding one intelligent civilization, each visit takes centuries/millennia, total search time millions of years, or must detect signal first (extremely rare) then civilization might be extinct by arrival time. Greene argues quantitatively that mission to detected civilization 500 light-years away is impossible at every stage, interstellar travel violates human biology and civilization timescales not just current technology limits, we're permanently confined to solar system by physics itself.