Could the world end? In a way yes the world could end and here are a few possible outcomes. The first is if an Asteroid hit us we wouldn't have to wait millions of years for it to happen. In 1908 a 200 foot wide comet striked the atmosphere and exploded over the Tunguska region in Siberia, Russia, and with nearly 1,000 times the energy of the atomic bomb dropped on Hiroshima. Astronomers estimate similar sized experience occurs every one to three centuries. I really like this next one, black holes. Our galaxy is full of black holes, but how full are these black holes? Well they’re called black holes for a reason. Their gravity is so strong they swallow everything in sight. Researchers guesstimate there are about 10 million black holes in the Milky Way. These objects orbit just like other stars, meaning that it is not horribly likely that one is headed our way. But if a common star were moving toward us, we'd know it. With a black hole there is little to no warning. The next one would have to be giant solar flares. Solar flares are enormous magnetic outbursts on the sun that attack Earth with a gush of high-speed subatomic particles. Records, Bradley Schaefer of Yale University found evidence that some perfectly normal-looking, sun like stars can open up by a factor of 20. Bradley believes these stellar flickers are caused by super flares, millions of times more powerful than their common cousins. Within a few hours, a super flare on the sun could fry Earth and begin rotting the ozone layer. The second to last one is one I’ve already written on and I totally agree with is, global warming. The Earth is getting warmer, and scientists mostly agree that humans take some blame. It's easy to see how global warming could flood cities and wreck harvests. Increase the global temperature a bit, however, with water evaporating faster, freeing water vapor, which traps more heat, which drives carbon dioxide from the rocks, which drives temperatures still higher. Earth could end up much like Venus, where the high on a typical day is 900 degrees Fahrenheit. It would probably take a lot of warming to initiate such a runaway greenhouse effect. In conclusion those are only a couple ways that the earth could come to an end. What do you think could end the earth?
