There are many possibilities through which the world’s end can occur. There have been put forward many explanations as to how that all will happen. Here are just ten of the many possibilities that have been proposed by the scientists from all over the world about how life on earth will end.
10. Destruction through Nuclear Holocaust or Biochemical Weapons
9. Genetically Engineered Human Mutants
8. Invasion by Aliens from the Outer Space
One of the adventurous stories that science-fiction always has to offer is something about aliens invading the earth descending g through their UFOs. If one was to believe that there is an intelligent life existing in some other part of the universe and that it is trying to connect with us, they might at least make a visit. If they are of domineering nature, like humans, they might actually invade instead of merely visiting. The threat is of them possessing far superior weapons that would be enough to kill the whole of human kind instantly.
7. Collision of an Asteroid
6. Reversal of Geomagnetic Field
Earth has a magnetic field which has a north and a south pole, which also make the end of earth’s axial points. The purpose of the earth’s magnetic field is to protect it from cosmic radiations, solar wind and subatomic particles from space. Scientists believe that every tens of thousands of years to millions of years, earth’s magnetic field gets reversed. The last time it occurred was over 780,000 years ago, called the Brunhes-Matuyama reversal. Over the past century, the earth’s magnetic field has decreased in strength about 5%. If natural changes that occur inside the earth happen to be extreme, it could alter the magnetic field and end all life as we know it
5. Earth Spins Off Its Axis
One of the factors which is sustaining life on the planet earth is its location in the Solar System. It is neither too far from the sun, so as to kill life from cold temperature, and nor too near it to kill life from overexposure to harmful sun rays. It spins on its axis to give us day and night and revolves around the sun to give us seasons. If earth was to spin off from its axis even a little bit, the whole balance would be disturb that would directly affect living conditions. The right pull of gravity from the sun and the right push of centrifugal forces is what keeps the axis in the right place. The current axial tilt of the earth is 23.5°, which remains the same through its rotation and revolution. The external forces which can cause an impact large enough to disturb this tilt of the axis include massive earthquakes or volcanic eruptions.
4. The Big Freeze
Scientists believe that since the Big Bang, which essentially created the universe, there has been a constant process of expansion that has not stopped and will never cease. This very expansion of the universe would lead heavenly bodies away from the center of the universe. In the process, earth would be moving away from its center, which is the sun. When that happens, called the Big Freeze, the coldness will prevail over the earth. Under such extreme coldness existence of life is not possible. The phenomenon of global warming is something that can speed up the process of the Big Freeze real quickly.
3. Solar Flares and Gamma-Ray Bursts
There are massive explosions taking place on the surface of the sun, which release incredible amount of heat energy. The sounds of these sun explosions are not heard because of the vacuum that exists in space, through which sound waves cannot travel. However, these sun explosions do give out solar flares which do reach the earth’s atmosphere. These solar flares are most harmful to the Ozone Layer, which basically works to protect us from these high radiations. The very unpredictability of a solar flare is what is fearful. Gamma-ray bursts, which according to scientists has never taken place in Milky Way, our galaxy, but has a possibility of occurring anytime. Solar flares and gamma-ray bursts can destroy earth.
2. The Death of the Sun or the Universe
2. The Death of the Sun or the Universe
Every star in the universe has a life-span completing which it fades away to its own death. Sun is the star, which is still in its early ages, but there would come a time when it too will expire. Along with this fact that sun is a red star which has to die, the universe having been born once would face an end too. When there would be no sun or no universe, the earth will not exist in isolation against natural laws. The end of universe will occur, as believed by scientists, when it would not have any more capacity to expand and would reach its limit by exploding killing all life forms and life-sustaining conditions.