Are you feeling down today? Well, let me sink you further down by giving you something more to worry about. There have been several mass extinction during the history of life on earth. Scientists tell us that way, way back about 250 million years ago, about 80 percent of all life on earth ended. Now, I would say that that was really an apocalypse, wouldn't you say? This was caused by global warming (where was Al Gore when you needed him?) when volcanic eruptions occurred in Siberia. Siberian rock is very high in carbon, so the volcano dumped tons and tons of carbon dioxide into the atmosphere.
Then again 65 million years ago, another apocalypse!! An asteroid crashed into earth, hitting an area rich in sulfur which caused acid rain and global cooling, much to the demise of the dinosaurs. Today, carbon dioxide levels are the highest they have been for over 800,000 years. Something has to give!! Move over dinosaurs, here we come. . .
How about something worse, like the earth passing through a cloud of dust? They say that that may happen once every billion years. You see, the earth doesn't just speed around the sun once a year, but our solar system is located in an arm of our galaxy which spins around in space as it moves where ever it is headed to and we could pass through a cloud of gas that would block a significant amount of our sunlight for maybe up to or over 200,000 years.
Isn't this an exciting place and time to be alive? Now, I hope I have cheered you all up today who were feeling down so that you all could have yourselves a great day, you hear?