The survival of mankind and civilization is a natural instinct that has kept us alive for thousands of years. However, during the past few decades the scientific community has become more aware than ever before of global catastrophic risks (GCR)—the risk of events large enough to significantly harm or even destroy human civilization on a global scale. Here follow 25 of the most catastrophic disasters against humanity that we might have to deal with in the near or distant future.
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The era of black holes
The Black Hole Era, perfectly described in The Five Ages of the Universe, a book written by professors Fred Adams and Gregory P. Laughlin, is an age in which organized matter will remain only in the form of black holes. Black holes themselves slowly “evaporate” the matter contained in them, by the quantum mechanical process of Hawking radiation. By the end of this era, only extremely low-energy photons, electrons, positrons, and neutrinos will remain. In other words, say bye-bye to our beautiful blue planet.
According to most religions the so-called end-time is described through various hypothetical scenarios (Day of Judgment, second coming of Christ, the coming of the Antichrist, etc.) that all agree on one thing: the end of the world as we know it and the passage to the afterlife. The strangest thing, however, is that even though science rejects the majority of these religious theories, a great number of scientists accepts the end-time as a possible catastrophic risk.
A global oppressive government
Easily the most possible scenario of all included on this list, just picture a bunch of whackos akin to Hitler, Stalin, Saddam, Kim Jong-un, and others of this “class” dominating the world’s politics and economy.
According to this wild “end of the world” risk that involves molecular nanotechnology, out-of-control self-replicating robots will kill humans and conquer the planet. Terminator, anyone?
Some scientists fear that a gamma-ray burst, the most powerful kind of explosion known in the universe that has been observed in distant galaxies, may trigger a mass extinction on Earth one day. These deadly explosions could also help explain the so-called Fermi paradox, the seeming contradiction between the high chance of alien life and the lack of evidence for it, which, in other words, means that aliens existed before a gamma-ray burst killed them.