Theory of evolution explains that we human beings or scientifically named as Homo sapiens evolved from the tiny unicellular organism over a course of billion years. Scientific study has suggested that modern human are only 200,000 years old. But few month earlier in mountain in Morocco a fossil of modern human was found that dated 300,000 years back. Which not only shook the foundation of human history but also devastated our understanding of the timeline of modern human civilization. Afterall filling 100,000 years gap is not an easy job!
Have you ever wondered what would be an ultimate fate of humanity? Where do we stand decades from now? Almost every scholar agrees that Extinction of human is almost sure. Only a question is HOW ??
I would like to discuss Some of the Possible Scenarios of human extinction
Nuclear Warfare:
It may sound stupid that humanity has an ability of self-destruction. Growing number of warhead arsenal all around the world is enough to wipe out entire humanity. If political disputes are not solved in time World war III could cause total annihilation of humankind, after all, world war took place two times so no one can guarantee that World war III will not take place. A nuclear weapon will not blow up entire humanity in a second, but we have no chance of surviving radiation.
Cosmological disaster:
Our earth has been hit by a huge asteroid in the different time interval. Last major incident occurred was 2013, when a 20-meter meteor exploded over Chelyabinsk, Russia, which smashed houses windows and caused injuries to more than 1,000 people. A slight bigger meteor do much more damage. And there are millions of them in the asteroid belt between Mars and jupitor. Other cosmological events can be gamma-ray burst, Super volcanic eruption.
Epidemic :
The rapid spread of some deadly virus all over the world can case a threat to humanity. The outbreak of genetically engineered viruses will be a major threat in near future. World ending disease like Ebola, swine flu, Spanish flu keep popping up around the world from nowhere.
On December 17, 1903, humanity learn to take off in the sky. This was the day we started to fly in the sky. Just after 66 years of our first flight on July 20, 1969, humankind footstep mark was on the surface of the moon. Stephen Hawking believes that humankind will not end with earth. they will eventually find a better home elsewhere. But giant telescopes facing towards space has not discovered any habitable planet yet.
Unfortunately, If Humankind ends here than will any advance life in future will find out we were here? This question will remain unanswered but we have already managed to send the gold-plated audio-visual disc in case the spacecraft should ever be found by intelligent life forms from other planetary systems. The disk carries a picture of earth and its life form. It includes spoken greeting in all language, greetings from Secretary-General of the United Nations and the President of the United States. The recording is named as "Sounds of Earth". It also includes the sounds of whales, a baby crying, waves breaking on a shore, and a collection of music. And it's not the alone prob, there are five interstellar probes: Voyager 1, Voyager 2, Pioneer 10, Pioneer 11 and New Horizons in a different direction.
President Carter's statement:
"We cast this message into the cosmos ... Of the 200 billion stars in the Milky Way galaxy, some – perhaps many – may have inhabited planets and space faring civilizations. If one such civilization intercepts Voyager and can understand these recorded contents, here is our message: This is a present from a small distant world, a token of our sounds, our science, our images, our music, our thoughts, and our feelings. We are attempting to survive our time so we may live into yours. We hope some day, having solved the problems we face, to join a community of galactic civilizations. This record represents our hope and our determination and our goodwill in a vast and awesome universe."?
Who knows who will find out that disc in billion years from now when entire humanity has already gone.
References:
http://www.presidency.ucsb.edu/ws/?pid=7890