Veritasium
What Can Frogs See That We Can't?
2013 E5 Mar 3, 2013 10m
What would you see if you were drifting through space, looking back at the sun? Well its light intensity would decrease as the inverse square of distance from the sun. And you would imagine the intensity would decrease smoothly, asymptotically approaching zero.
Where to Watch What Can Frogs See That We Can't?