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Why Aren’t Humans Naturally Nocturnal?

263,605 views

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Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

98%
  • 4:03 / 4:07

Speech Rate:

  • 165 wpm - Fast

Category:

  • Science & Technology

Tags :

Intro:

Video Vocabulary

because

/bēˈkəz/

conjunction

for reason that.

release

/rəˈlēs/

noun verb

action or process of releasing or being released. allow or enable to escape from confinement.

circadian

/sərˈkādēən/

adjective noun

(of biological processes) recurring naturally on twenty-four-hour cycle, even in absence of light fluctuations. Concerning biological processes occurring at -hour intervals.

wakefulness
noun

A state of being conscious and aware of the world.

connected

/kəˈnektəd/

adjective verb

brought together so that link is established. To associate a thing with something else.

darkness

/ˈdärknəs/

noun

The state or quality of being dark in color.

watchers

/ˈwäCHər/

noun other

person who observes something attentively or regularly. People who watch (TV, birds, etc.).

entering

/ˈen(t)ər/

verb

To add or type information in a computer.

probably

/ˈpräbəblē/

adverb

certainly.

hormone

/ˈhôrˌmōn/

noun

regulatory substance produced in organism and transported in tissue fluids such as blood.

explains

/ikˈsplān/

verb

make idea or situation clear to someone by describing it in more detail.

perceive

/pərˈsēv/

verb

To think of someone or something in a certain way.

changes

/CHānj/

noun other verb

act or process bringing change. Acts of making or becoming something else. make different.

widespread

/ˈwīdˌspred/

adjective

Happening or existing in many places.

causing

/kôz/

verb

make something happen.

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