Shake your head back and forth. Did you feel like you were making an absolutely insane looking expression? Probably not, but, as you'll see in this video (which would make a great screensaver), viewed in slow motion you would have — most likely, just for a moment — appeared rather silly.

Everything from big budget science fiction films to very real ancient texts have primed us for any number of doomsday scenarios promising to bring an end to civilization as we know it. But none have gained more traction in recent years than the Mayan calendar end-of-days prophecy. To address these concerns, NASA has released a new video in which the agency seeks to debunk any fears of a cosmic catastrophe.

Most of us are aware that inhaling a mouthful of helium can give a person's voice a humorous, high-pitched tone that mimics a vocal recording played at high speed. But what some of you may not know is there is in fact another gas that has exactly the opposite effect, as a simple science lesson recently delivered by a high school teacher shows.

Get excited piña colada fans: did you know that there's a whole team of scientists working to perfect the signature flavors in this mixed drink? Sure, some researchers are working on cures for cancer or whatever, but these folks get to mess around with pineapples that taste like coconuts all day long.