[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:06.17,0:00:09.93,Default,,0000,0000,0000,,Our story is about a girl named Iris.
Dialogue: 0,0:00:09.93,0:00:13.36,Default,,0000,0000,0000,,Iris is very sensitive.
Dialogue: 0,0:00:13.36,0:00:16.100,Default,,0000,0000,0000,,So much that she is always in tears.
Dialogue: 0,0:00:16.100,0:00:20.00,Default,,0000,0000,0000,,She cries when she's sad,
Dialogue: 0,0:00:20.00,0:00:23.08,Default,,0000,0000,0000,,when she's happy,
Dialogue: 0,0:00:23.08,0:00:28.02,Default,,0000,0000,0000,,and even tears up when things just get to her.
Dialogue: 0,0:00:28.02,0:00:31.36,Default,,0000,0000,0000,,She has special lacrimal glands to make new tears
Dialogue: 0,0:00:31.36,0:00:33.79,Default,,0000,0000,0000,,and special tubes, called lacrimal puncta,
Dialogue: 0,0:00:33.79,0:00:36.91,Default,,0000,0000,0000,,to drain old ones away.
Dialogue: 0,0:00:36.91,0:00:38.95,Default,,0000,0000,0000,,And she cries so much that she goes through
Dialogue: 0,0:00:38.95,0:00:41.26,Default,,0000,0000,0000,,ten ounces of tears per day,
Dialogue: 0,0:00:41.26,0:00:43.47,Default,,0000,0000,0000,,thirty gallons a year!
Dialogue: 0,0:00:43.47,0:00:45.37,Default,,0000,0000,0000,,In fact, if you look closely,
Dialogue: 0,0:00:45.37,0:00:49.97,Default,,0000,0000,0000,,you'll see that she's crying a little bit all the time.
Dialogue: 0,0:00:49.97,0:00:52.59,Default,,0000,0000,0000,,The basal tears that Iris constantly produces
Dialogue: 0,0:00:52.59,0:00:54.100,Default,,0000,0000,0000,,form a thin coating of three layers
Dialogue: 0,0:00:54.100,0:00:58.38,Default,,0000,0000,0000,,that cover her and keep dirt and debris away.
Dialogue: 0,0:00:58.38,0:01:00.92,Default,,0000,0000,0000,,Right next to Iris is the mucus layer,
Dialogue: 0,0:01:00.92,0:01:03.74,Default,,0000,0000,0000,,which keeps the whole thing fastened to her.
Dialogue: 0,0:01:03.74,0:01:06.06,Default,,0000,0000,0000,,On top of it is the aqueous layer,
Dialogue: 0,0:01:06.06,0:01:07.52,Default,,0000,0000,0000,,which keeps Iris hydrated,
Dialogue: 0,0:01:07.52,0:01:09.45,Default,,0000,0000,0000,,repels invasive bacteria,
Dialogue: 0,0:01:09.45,0:01:13.17,Default,,0000,0000,0000,,and protects her skin, or cornea, from damage.
Dialogue: 0,0:01:13.17,0:01:15.58,Default,,0000,0000,0000,,And, finally, there is the lipid layer,
Dialogue: 0,0:01:15.58,0:01:17.53,Default,,0000,0000,0000,,an oily outer film that keeps the surface smooth
Dialogue: 0,0:01:17.53,0:01:20.34,Default,,0000,0000,0000,,for Iris to see through,
Dialogue: 0,0:01:20.34,0:01:22.100,Default,,0000,0000,0000,,and prevents the other layers from evaporating.
Dialogue: 0,0:01:22.100,0:01:24.93,Default,,0000,0000,0000,,Normally, Iris goes about her day
Dialogue: 0,0:01:24.93,0:01:26.89,Default,,0000,0000,0000,,without really noticing the basal tears
Dialogue: 0,0:01:26.89,0:01:28.21,Default,,0000,0000,0000,,doing their thing.
Dialogue: 0,0:01:28.21,0:01:30.04,Default,,0000,0000,0000,,That's kind of their whole point.
Dialogue: 0,0:01:30.04,0:01:32.92,Default,,0000,0000,0000,,But one day, she meets a girl named Onion.
Dialogue: 0,0:01:32.92,0:01:34.91,Default,,0000,0000,0000,,Iris is immediately smitten.
Dialogue: 0,0:01:34.91,0:01:37.58,Default,,0000,0000,0000,,Onion looks gorgeous in her bright purple jacket,
Dialogue: 0,0:01:37.58,0:01:39.83,Default,,0000,0000,0000,,and she smells terrific.
Dialogue: 0,0:01:39.83,0:01:42.34,Default,,0000,0000,0000,,So, Iris invites Onion to her house for dinner,
Dialogue: 0,0:01:42.34,0:01:45.03,Default,,0000,0000,0000,,but when she comes in and takes off her jacket,
Dialogue: 0,0:01:45.03,0:01:47.25,Default,,0000,0000,0000,,something terrible happens.
Dialogue: 0,0:01:47.25,0:01:49.66,Default,,0000,0000,0000,,You see, when Onion's jacket is removed,
Dialogue: 0,0:01:49.66,0:01:51.50,Default,,0000,0000,0000,,a chemical reaction happens,
Dialogue: 0,0:01:51.50,0:01:54.78,Default,,0000,0000,0000,,converting the sulfoxides that make her smell so great
Dialogue: 0,0:01:54.78,0:01:56.62,Default,,0000,0000,0000,,into sulfenic acid,
Dialogue: 0,0:01:56.62,0:02:00.58,Default,,0000,0000,0000,,which then becomes a nasty substance with a long name:
Dialogue: 0,0:02:00.58,0:02:03.82,Default,,0000,0000,0000,,syn-Propanethial S-oxide.
Dialogue: 0,0:02:03.82,0:02:06.20,Default,,0000,0000,0000,,The gas stings Iris,
Dialogue: 0,0:02:06.20,0:02:07.70,Default,,0000,0000,0000,,and suddenenly, she can't help it,
Dialogue: 0,0:02:07.70,0:02:10.33,Default,,0000,0000,0000,,she starts weeping uncontrollably.
Dialogue: 0,0:02:10.33,0:02:13.16,Default,,0000,0000,0000,,These reflex tears are different from the basal tears
Dialogue: 0,0:02:13.16,0:02:14.88,Default,,0000,0000,0000,,that Iris is used to.
Dialogue: 0,0:02:14.88,0:02:16.29,Default,,0000,0000,0000,,Because they're designed
Dialogue: 0,0:02:16.29,0:02:17.83,Default,,0000,0000,0000,,to wash away harmful substances, or particles,
Dialogue: 0,0:02:17.83,0:02:21.22,Default,,0000,0000,0000,,they're released in much larger amounts,
Dialogue: 0,0:02:21.22,0:02:23.91,Default,,0000,0000,0000,,and their aqueous layer contains more antibodies
Dialogue: 0,0:02:23.91,0:02:28.25,Default,,0000,0000,0000,,to stop any microorganisms that may be trying to get in, as well.
Dialogue: 0,0:02:28.25,0:02:30.91,Default,,0000,0000,0000,,Both Iris and Onion are devastated.
Dialogue: 0,0:02:30.91,0:02:32.84,Default,,0000,0000,0000,,They know they can't continue their relationship
Dialogue: 0,0:02:32.84,0:02:34.78,Default,,0000,0000,0000,,if Iris is going to hurt and cry
Dialogue: 0,0:02:34.78,0:02:37.61,Default,,0000,0000,0000,,every time Onion takes off her jacket.
Dialogue: 0,0:02:37.61,0:02:39.52,Default,,0000,0000,0000,,So, they decide to break up.
Dialogue: 0,0:02:39.52,0:02:41.67,Default,,0000,0000,0000,,As Onion walks out the door,
Dialogue: 0,0:02:41.67,0:02:43.35,Default,,0000,0000,0000,,Iris stops crying.
Dialogue: 0,0:02:43.35,0:02:44.87,Default,,0000,0000,0000,,And immediately starts again.
Dialogue: 0,0:02:44.87,0:02:47.16,Default,,0000,0000,0000,,Only now, she's not crying reflex tears
Dialogue: 0,0:02:47.16,0:02:49.66,Default,,0000,0000,0000,,but emotional tears.
Dialogue: 0,0:02:49.66,0:02:52.59,Default,,0000,0000,0000,,When someone is either too sad or too happy,
Dialogue: 0,0:02:52.59,0:02:54.37,Default,,0000,0000,0000,,it feels like a loss of control,
Dialogue: 0,0:02:54.37,0:02:55.64,Default,,0000,0000,0000,,which can be dangerous.
Dialogue: 0,0:02:55.64,0:02:57.16,Default,,0000,0000,0000,,So, emotional tears are sent in
Dialogue: 0,0:02:57.16,0:02:58.84,Default,,0000,0000,0000,,to stabilize the mood
Dialogue: 0,0:02:58.84,0:03:00.83,Default,,0000,0000,0000,,as quickly as possible,
Dialogue: 0,0:03:00.83,0:03:02.76,Default,,0000,0000,0000,,along with other physical reactions,
Dialogue: 0,0:03:02.76,0:03:04.33,Default,,0000,0000,0000,,such as an increased heart rate
Dialogue: 0,0:03:04.33,0:03:05.92,Default,,0000,0000,0000,,and slower breathing.
Dialogue: 0,0:03:05.92,0:03:07.85,Default,,0000,0000,0000,,But scientists still aren't sure
Dialogue: 0,0:03:07.85,0:03:11.58,Default,,0000,0000,0000,,exactly how or why the tears themselves are helpful.
Dialogue: 0,0:03:11.58,0:03:13.18,Default,,0000,0000,0000,,They may be a social mechanism
Dialogue: 0,0:03:13.18,0:03:16.00,Default,,0000,0000,0000,,to elicit sympathy or show submission.
Dialogue: 0,0:03:16.00,0:03:17.82,Default,,0000,0000,0000,,But some studies have also found
Dialogue: 0,0:03:17.82,0:03:19.77,Default,,0000,0000,0000,,that emotional tears contain higher levels
Dialogue: 0,0:03:19.77,0:03:21.40,Default,,0000,0000,0000,,of stress hormones,
Dialogue: 0,0:03:21.40,0:03:24.32,Default,,0000,0000,0000,,such as ACTH and enkephalin,
Dialogue: 0,0:03:24.32,0:03:26.67,Default,,0000,0000,0000,,an endorphin and natural pain killer.
Dialogue: 0,0:03:26.67,0:03:30.42,Default,,0000,0000,0000,,In this case, emotional tears are also directly calming Iris down,
Dialogue: 0,0:03:30.42,0:03:33.42,Default,,0000,0000,0000,,as well as signaling her emotional state to others.
Dialogue: 0,0:03:33.42,0:03:35.70,Default,,0000,0000,0000,,Sorry things didn't work out with Onion, Iris,
Dialogue: 0,0:03:35.70,0:03:37.08,Default,,0000,0000,0000,,but don't worry.
Dialogue: 0,0:03:37.08,0:03:39.41,Default,,0000,0000,0000,,As long as you have all three kinds of tears
Dialogue: 0,0:03:39.41,0:03:41.17,Default,,0000,0000,0000,,working to keep you balanced and healthy,
Dialogue: 0,0:03:41.17,0:03:42.30,Default,,0000,0000,0000,,it will get better.
Dialogue: 0,0:03:42.30,0:03:43.02,Default,,0000,0000,0000,,You'll see.