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Is Spring Fever Real? - Instant Egghead #68

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    Ahh, spring fever.
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    That boost of energy,
    vitality, and sexual appetite
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    associated with spring.
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    It's been written about
    for centuries.
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    but does it really exist?
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    There's definately something
    in the springtime air
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    A Canadian study showed that
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    the rate of teen pregnancy
    peaks in March.
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    Right around spring break.
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    And another found,
    that men produce the most
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    and the healthiest sperm
    in early spring.
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    What's causing this seasonal shift?
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    Scientists think, that our
    increased energy and better mood
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    have to do with changes
    in hormone levels.
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    An important one is melatonin
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    sometimes called the "sleep hormone"
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    It's realeased at night and
    helps us fall asleep.
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    When the nights are longer
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    we produce more melatonin.
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    And in spring, as the nights get shorter,
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    we produce less of it.
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    Maybe explaining why we feel
    more awake and more active.
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    Serotonin is another chemical
    that affects our mood.
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    It's known as the "happiness hormone"
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    And its levels arise
    in spring time as it gets sunnier.
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    Antrophologists think that
    these changes in hormone levels
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    may have to do with
    survival and reproduction.
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    Many animals lay low in the winter
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    using less energy because food is scarce.
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    Early humans might have done the same.
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    And when food became
    more abundant in the spring,
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    it makes sense,
    they become more... active.
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    Not surprisingly,
    as you move toward the equator,
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    spring fever disappears.
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    For example, scientists have noticed
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    that seasonal changes in
    the birth rates of field mice flatten out
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    as you get closer to the equator.
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    But sunshine may not be the only
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    springtime "pick-me-up".
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    For humans, the optimal temperature
    for good mood is 72F.
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    And let's face it,
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    once the temperature starts to rise,
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    we're wearing a lot less.
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    For Scientific American's
    Instant Egghead,
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    I'm Yasmin Tayag
Title:
Is Spring Fever Real? - Instant Egghead #68
Description:

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Video Language:
English, British
Team:
Scientific American
Project:
Instant Egghead
Duration:
02:08

English, British subtitles

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