1
00:00:01,880 --> 00:00:05,684
Rainfall
2
00:00:05,684 --> 00:00:11,369
Music
3
00:00:11,369 --> 00:00:16,104
This drop of water falling on soil is
about to liberate the smell of rain,
4
00:00:16,104 --> 00:00:19,330
which actually comes from
the earth, not the water.
5
00:00:19,790 --> 00:00:21,988
The scientist at MIT who made this video
6
00:00:21,988 --> 00:00:23,142
knew that much.
7
00:00:23,181 --> 00:00:24,959
What they didn't know, but now
8
00:00:24,959 --> 00:00:27,510
captured on video, is how it happens.
9
00:00:28,982 --> 00:00:30,981
You have to have the right size drop,
10
00:00:31,711 --> 00:00:33,691
falling at the right speed,
11
00:00:34,059 --> 00:00:35,581
on the right surface.
12
00:00:36,622 --> 00:00:40,402
As it hits the ground, it traps
tiny bubbles of air.
13
00:00:41,421 --> 00:00:43,373
Those bubbles then burst from the drop
14
00:00:43,373 --> 00:00:45,208
like fizz from champagne.
15
00:00:46,274 --> 00:00:49,233
And they carry with them
the smell of the earth,
16
00:00:49,233 --> 00:00:52,391
or the rain washed pavement,
or where ever they fall.
17
00:00:54,141 --> 00:00:56,258
These bubbles are not just capturing
18
00:00:56,258 --> 00:00:58,623
the molecules in the earth that smell good,
19
00:00:58,623 --> 00:01:01,030
they could also be transporting
20
00:01:01,030 --> 00:01:03,552
viruses or bacteria that cause diseases.
21
00:01:03,942 --> 00:01:06,532
So its bound to be useful to learn
22
00:01:06,532 --> 00:01:08,525
more about how it works.
23
00:01:08,525 --> 00:01:17,144
Music
24
00:01:17,144 --> 00:01:21,786
Rainfall