What are some things science still can't explain?

what's cool about these theories is that they are still really unlikely. The interstellar spaceship thing is blown WAY out of proportion as a theory, it's really not a serious suggestion. The outgassing thing is also pretty unlikely - if there are jets of gas escaping, then it is virtually certain that they would not be aligned perfectly through the objects centre of mass, so they would produce spin, not thrust. Even if they are aligned perfectly, then how much gas is in there to still be generating thrust after who knows how long in space? What would be the pressure of the gas inside that thing, and what is it made of that would withstand those pressures?

/r/AskReddit Thread Parent