On of the most underrated uses of the computer is as a visualization tool. Digital media can allow us to conceptualize processes existing on levels that we can't directly perceive.
I thought the animation in this TED talk by Drew Berry, showing the molecular workings within our own cells, was pretty mind-blowing.
Since I'm talking about small-scale phenomena, I'll also post this almost surreal video of tiny organisms in water.
Even though the narrator talks like some kind of robotic alien, the video of the microscopic creatures is amazing. Turn off the sound & put on Groove Salad instead.
It makes me wonder... what in the world is going on with this very weird thing we call "Life"?!?!