You may joke that, when something sad brings a tear to your eye, someone is chopping onions in the room. But if you compared those two types of tears under a microscope, would they look similar?
Chris Hadfield's series of videos showing us how various activities work in space is endlessly fascinating and sometimes a little strange. In this video, he shows us what happens when you cry in space without gravity to make your tears fall.
What do the creatures from your closet use to add a floral quality to their chocolate souffle? The lavender-scented salts derived the tears of human sorrow. If they want more of a kick to their meat, they may choose the peppery salt from tears of sneezing, or the powerful salt from tears of anger.