Towards the end of 1970, astronomers detected a rogue comet, later named Lee- Kosolov, entering our solar system. Early predictions established that once it swung around the sun, its return journey would bring it close to Earth’s orbit for a near miss.
However, as it passed around the opposite side of the sun at its perihelion, the unthinkable happened. The comet fragmented into four chunks of cosmic debris with each fragment on new, return orbital paths… straight at Earth.
On the 17th of April, 1972, the first of those comet parcels struck the planet. The first area to be hit was San Francisco, followed by New York, and then Paris. Each struck with the force of many explosions.
The final impact was from the largest specimen of the cosmic invader which slammed into, and obliterated Japan.
Though there was time to evacuate many from the impact zones, billions still perished; some as direct result of the blasts; others from the secondary effects that followed.
The shockwaves leveled hundreds of square miles outside of the estimated impact zones and tsunamis wrought further destruction.
In the days and weeks that followed, dust ejected from the strikes spread through the atmosphere until it engulfed the entire planet.
Even with contingency plans in place, the various global governments were still woefully unprepared. Lines of communication had collapsed when a resulting EM pulse from the impacts rendered any operating electronic equipment completely useless, essentially resetting technology back a century.
With the dust cloud creating a perpetual gloom, many species of animal and plant life were lost, unable to adapt to survive the new conditions.
Mankind, however, would endure.