So, for the first topic I've moved this one. This is one of my friends' favorite themes of mine ever, due to the topic's interesting mind.

Aliens is the first idea that comes to mind. And the most popular one, too. There are some huge argues between people who believe and don't believe in ET. Both sides have their own clever and silly arguments and facts. I personally don't think that aliens have done these practical jokes even if they do exist. What for, let me ask? Just for fun?! Naaaaa.... Unconvincing at all.