[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:05.70,0:00:06.67,Default,,0000,0000,0000,,spring fever
Dialogue: 0,0:00:07.07,0:00:08.67,Default,,0000,0000,0000,,that's full of energy, vitality
Dialogue: 0,0:00:08.93,0:00:11.34,Default,,0000,0000,0000,,and sexual appetite associated with spring
Dialogue: 0,0:00:12.07,0:00:13.74,Default,,0000,0000,0000,,it's been written about for centuries
Dialogue: 0,0:00:13.74,0:00:14.82,Default,,0000,0000,0000,,but does it really exist?
Dialogue: 0,0:00:15.03,0:00:17.99,Default,,0000,0000,0000,,there's definitely something in this spring time air
Dialogue: 0,0:00:18.08,0:00:20.13,Default,,0000,0000,0000,,a Canadian study showed a way that
Dialogue: 0,0:00:20.38,0:00:22.02,Default,,0000,0000,0000,,teen pregnancy peaks in March
Dialogue: 0,0:00:22.14,0:00:23.69,Default,,0000,0000,0000,,right around spring break
Dialogue: 0,0:00:23.69,0:00:25.30,Default,,0000,0000,0000,,and another found that men
Dialogue: 0,0:00:25.30,0:00:26.26,Default,,0000,0000,0000,,produce the most
Dialogue: 0,0:00:26.39,0:00:27.95,Default,,0000,0000,0000,,and the healthiest sperm
Dialogue: 0,0:00:28.02,0:00:29.05,Default,,0000,0000,0000,,in early spring
Dialogue: 0,0:00:29.29,0:00:31.50,Default,,0000,0000,0000,,what's causing this seasonal shift?
Dialogue: 0,0:00:31.85,0:00:33.31,Default,,0000,0000,0000,,Scientists think our increase in
Dialogue: 0,0:00:33.33,0:00:34.59,Default,,0000,0000,0000,,energy and better mood
Dialogue: 0,0:00:34.59,0:00:36.66,Default,,0000,0000,0000,,have to do with changes in hormone levels
Dialogue: 0,0:00:36.66,0:00:38.33,Default,,0000,0000,0000,,an important one is melatonin
Dialogue: 0,0:00:38.39,0:00:40.71,Default,,0000,0000,0000,,sometimes called the "sleep hormone"
Dialogue: 0,0:00:40.76,0:00:43.10,Default,,0000,0000,0000,,it's released at night and helps us to fall asleep
Dialogue: 0,0:00:43.10,0:00:44.65,Default,,0000,0000,0000,,when the nights are longer
Dialogue: 0,0:00:44.77,0:00:46.34,Default,,0000,0000,0000,,we produce more melatonin
Dialogue: 0,0:00:46.88,0:00:48.96,Default,,0000,0000,0000,,and in spring, as the night gets shorter
Dialogue: 0,0:00:49.09,0:00:50.34,Default,,0000,0000,0000,,we produce less of it
Dialogue: 0,0:00:50.43,0:00:51.91,Default,,0000,0000,0000,,may be explaining why we feel
Dialogue: 0,0:00:51.91,0:00:53.65,Default,,0000,0000,0000,,more awake and more active
Dialogue: 0,0:00:53.69,0:00:55.31,Default,,0000,0000,0000,,seratonin is another chemical
Dialogue: 0,0:00:55.40,0:00:56.61,Default,,0000,0000,0000,,that affects our mood
Dialogue: 0,0:00:56.94,0:00:58.70,Default,,0000,0000,0000,,it's known as the "happiness hormone"
Dialogue: 0,0:00:58.70,0:01:00.45,Default,,0000,0000,0000,,and it's level risens in spring time
Dialogue: 0,0:01:00.45,0:01:01.58,Default,,0000,0000,0000,,as it gets sunnier
Dialogue: 0,0:01:01.74,0:01:03.46,Default,,0000,0000,0000,,and the pathologists think that
Dialogue: 0,0:01:03.46,0:01:04.65,Default,,0000,0000,0000,,this changes in hormone levels
Dialogue: 0,0:01:04.65,0:01:06.45,Default,,0000,0000,0000,,may have to do with survival and
Dialogue: 0,0:01:06.49,0:01:07.30,Default,,0000,0000,0000,,reproduction
Dialogue: 0,0:01:07.32,0:01:09.11,Default,,0000,0000,0000,,many animals lay low in the winter
Dialogue: 0,0:01:09.11,0:01:11.20,Default,,0000,0000,0000,,using less energy because food is sacarce
Dialogue: 0,0:01:11.20,0:01:13.00,Default,,0000,0000,0000,,early humans might have done the same
Dialogue: 0,0:01:13.04,0:01:15.66,Default,,0000,0000,0000,,when food became more abundant in the spring
Dialogue: 0,0:01:16.17,0:01:18.16,Default,,0000,0000,0000,,and it make sense that they become...
Dialogue: 0,0:01:18.20,0:01:18.88,Default,,0000,0000,0000,,more....
Dialogue: 0,0:01:19.46,0:01:20.06,Default,,0000,0000,0000,,active
Dialogue: 0,0:01:20.30,0:01:21.16,Default,,0000,0000,0000,,not surprisingly
Dialogue: 0,0:01:21.16,0:01:22.90,Default,,0000,0000,0000,,as you move toward the equator
Dialogue: 0,0:01:22.90,0:01:24.26,Default,,0000,0000,0000,,spring fever disappears
Dialogue: 0,0:01:24.46,0:01:25.24,Default,,0000,0000,0000,,for example
Dialogue: 0,0:01:25.44,0:01:27.74,Default,,0000,0000,0000,,scientists have noticed that seasonal changes
Dialogue: 0,0:01:27.76,0:01:29.49,Default,,0000,0000,0000,,and the birth rates of field mice
Dialogue: 0,0:01:29.49,0:01:30.27,Default,,0000,0000,0000,,flatten out
Dialogue: 0,0:01:30.47,0:01:32.26,Default,,0000,0000,0000,,as you get closer to the equator
Dialogue: 0,0:01:32.26,0:01:34.01,Default,,0000,0000,0000,,but sunshine may not be the only
Dialogue: 0,0:01:34.01,0:01:35.45,Default,,0000,0000,0000,,spring time "pick me up"
Dialogue: 0,0:01:35.60,0:01:37.56,Default,,0000,0000,0000,,for humans, the optimal temperature for
Dialogue: 0,0:01:37.56,0:01:39.55,Default,,0000,0000,0000,,good mood is 72 degrees Fahrenheit
Dialogue: 0,0:01:40.21,0:01:41.40,Default,,0000,0000,0000,,and let's face it
Dialogue: 0,0:01:41.53,0:01:43.52,Default,,0000,0000,0000,,once the temperature starts to rise
Dialogue: 0,0:01:44.17,0:01:45.53,Default,,0000,0000,0000,,we're wearing a lot less
Dialogue: 0,0:01:45.53,0:01:47.92,Default,,0000,0000,0000,,for Scientific American and Instant Egghead
Dialogue: 0,0:01:48.08,0:01:49.52,Default,,0000,0000,0000,,I'm Yasmin Tayag