1 Lethal viruses

"In the long run, I am more concerned about biology." Nuclear weapons need large installations, but genetic engineering can be done in a small laboratory. A virus that destroys us. " This was what Hawking said in 2001, when he was asked in an interview for the Telegraph newspaper about the end of the world. Viruses are invisible but relentless enemies. A small group of people with the indicated knowledge could easily develop a virus with potential annihilation.

2 The nuclear apocalypse

There are currently some 16,300 nuclear weapons in existence, according to the Federation of American Scientists. 1800 nuclear warheads, spread between Russia and the United States. Are on high alert, ready for immediate use, which means they could launch an attack at any time - though there would be no reason for this to happen - whose effects would be catastrophic for the whole world.
Stephen Hawking together and other scientists announced in 2007 "The Clock of the Apocalypse". It represents how close humanity is to a war and subsequent nuclear disaster. Initially the schedule was set at 5 minutes of 12 at night, or "zero hour", a term that refers to the instant where the explosion of an atomic bomb begins. We are currently 2 minutes from midnight.
Hawking said on the subject: "As citizens of the world, we have a duty to alert the public about the unnecessary risks we face each day, and the dangers we augur if governments and societies do not act now to give up nuclear weapons Obsolete and prevent further climate change".

3 Alien invasion

Multiple projects have been carried out to try to contact us with extraterrestrial life. From the SETI project that scrutinizes the skies with large radio telescopes in search of some signal of intelligent life, to the golden discs in the Voyager, which were thought like a "greeting" of the people of the Earth destined to possible intelligent beings .
Stephen warned of the dangers of contacting beings from other worlds, according to his theory: "If the aliens visited us, the result would be similar to when Columbus arrived in America, which was not very good for Native Americans."

4 An out-of-control artificial intelligence.

We warned him when we told how robotics meant the loss of work for many people in the UK. But Stephen goes a step further and theorizes about a possible "machine rebellion," he warned in The Independent
"Success in creating artificial intelligence would be the greatest event in the history of mankind. Unfortunately, it could also be the last, unless we learn how to avoid the risks"
The machines could outperform humans, which are clearly limited by biological evolution. They could take control by many means as "managing financial markets, inventing better than human researchers, manipulating human leaders and developing weapons that we can not even understand."

5 an experiment that unfortunately goes wrong.

The Large Hadron Collider unleashed more than a controversy when it began operations during 2008. There was the terror of the population, often unfounded and unsupported on scientific bases, and began to circulate on the Internet all sorts of theories that obviously never Fulfilled. The CERN was forced to defend itself before even to begin to investigate, until published a press release calling to the calm.
Hawking theorized about a possible critical failure of the collusive in the prologue to Starmus, 50 years of man in space where he wrote that at extreme levels of energy, the "God particle" could become unstable: "This could imply that the universe Catastrophic disintegration into the void, with a vacuum bubble expanding at the speed of light. " "It could happen anytime and we would not see it coming." Of course, an incredibly high amount of energy (100 billion gigaelectronvolts) would be needed, which would be impossible to generate.

Fuente: http://elmeme.me/Fedetxt/5-teorias-del-fin-del-mundo-segun-stephen-hawking_88445