In this week’s edition of SciShow news, Hank Green brings you discoveries involving two of the most exotic substances on Earth — the world’s rarest element and the world’s oldest water. Two great tastes that taste great together? Stay tuned to find out.
Why do ice cubes float? How come some insects can skate across a pond while humans sink to the bottom? Educator Christina Kleinberg says these are both offshoots of polarity, caused by the way that two hydrogen atoms combine with one oxygen atom to form water molecules. She explains in an animated TEDEducation talk.
