Rainfall
Music
This drop of water falling on soil is about to liberate the smell of rain,
which actually comes from the earth, not the water.
The scientist at MIT who made this video
knew that much.
What they didn't know, but now
captured on video, is how it happens.
You have to have the right size drop,
falling at the right speed,
on the right surface.
As it hits the ground, it traps tiny bubbles of air.
Those bubbles then burst from the drop
like fizz from champagne.
And they carry with them the smell of the earth,
or the rain washed pavement, or where ever they fall.
These bubbles are not just capturing
the molecules in the earth that smell good,
they could also be transporting
viruses or bacteria that cause diseases.
So its bound to be useful to learn
more about how it works.
Music
Rainfall