EDUCATIONAL FACTS | 10 Unsolved Mysteries of Space High energy particles constantly pelt Earth from outer space. Where do they come from? For the most part, we don't know! For all the knowledge we've gained about how the universe works, there is still much more that is a complete mystery.
FutchDuck.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.