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  • It's AumSum Time.

  • Can you guess the title of my next video?

  • Hurry up.

  • Write your guess in the comments section below.

  • Why do humans love music?

  • When vibrations are produced in a solid, liquid or a gas, our ears perceive it as sound.

  • When such sound vibrations are produced in specific and intricate patterns, then it is known as music.

  • Now, music neither seems to serve any evolutionary advantage nor it is a necessity like food and water.

  • So, when researchers tried to find out why we love music.

  • It turns out to be because of a neurotransmitter called dopamine.

  • When we eat food or take drugs.

  • The reward system in the brain is activated due to which the neurotransmitter dopamine is released.

  • Dopamine makes us feel good.

  • According to the research, it is observed that when we listen to music.

  • The same neurotransmitter dopamine is released, thus making us feel good and love music.

  • In addition to this, researches also observed that when there were peak emotional moments in a song.

  • More dopamine was released, thus making us feel the emotions more intensely.

  • Topic: Paper cut.

  • Why do paper cuts hurt so much?

  • It is because paper hates us.

  • No.

  • We use our fingers and hands to sense our surroundings.

  • Hence, they have more number of nociceptors than any other parts of our body.

  • Nociceptors are pain receptors that respond to change in pressure, temperature, etc.

  • Now, the edges of the paper are not smooth but are rough or jagged.

  • They are like a saw.

  • Absolutely.

  • Hence, sometimes when we rub our hands or especially fingertips against the edges.

  • It cuts themlike a saw, activating the nociceptors.

  • Now, as there are more nociceptors on our hands, we feel more.

  • In addition to this, the paper cut might also have fragments of paper containing chemicals.

  • Which may irritate the skin and thus increase the pain.

  • Why do birds need gravity to swallow food?

  • Maybe because they are fans of Newton.

  • No.

  • When humans eat food, it enters into a muscular organ called food pipe or esophagus.

  • In the esophagus.

  • A series of contraction and relaxation take place that pushes or moves food towards the stomach.

  • This movement is called peristalsis.

  • Why do you use such complicated names?

  • Just listen.

  • In most birds, such peristaltic movement doesn't take place in their esophagus.

  • Hence, they need to depend on gravity to push their food through the esophagus.

  • When a bird eats its food, the bird lifts or tilts its head up and with the help of its tongue.

  • It directs the food towards the throat.

  • Then the gravitational force of earth causes the food to slide down into a pouch called crop.

  • Thus helping it to swallow its food.

  • Why is yawning contagious?

  • Because everybody wants to sleep.

  • No.

  • There are a couple of theories which explain why yawning is contagious.

  • One of them suggests that it is a sign of empathy.

  • Empathy is the ability to understand and share others feelings.

  • For example, when people around us are happy and smiling, they make a positive impact on us.

  • Hence, we also feel good and begin to smile.

  • Moreover, the closer we are to someone such as our parents or friends.

  • The more likely we are to catch their yawn.

  • That's awesome.

  • Another theory suggests that mirror neurons present in our brain make us copy or mimic the actions performed by someone else.

  • Hence, when we see people around us yawn.

  • Our mirror neurons get activated, thus making us mimic their yawn.

  • We may have evolved such characteristic to promote social bonding.

  • Topic: Frequency

  • Why do women have shriller voices than men?

  • Hey.

  • That door will open only with a woman's voice command.

  • Don't try to fool me.

  • Oh no.

  • Now how will I enter?

  • Don't worry.

  • Just trust me.

  • A woman's voice is shriller.

  • So, speak as a woman.

  • Look.

  • The door opened.

  • This happened because of frequency.

  • Frequency is the number of vibrations per second.

  • More is the frequency, shriller will be the voice or sound.

  • Explain it to me quickly.

  • I can't wait.

  • Alright!!

  • Alright.

  • In humans, sound is produced with the help of vocal cords.

  • However, the length of vocal cords of women and men are different.

  • A woman's vocal chords are about 15 millimeters long while a man's vocal chords are about 20 millimeters long.

  • As the vocal chords of a man are comparatively longer.

  • They vibrate less per second, producing sound having low frequency.

  • However, the vocal chords of a woman being short vibrate more per second.

  • Thus producing sound having high frequency.

  • As the frequency of sound is higher, women have shriller voices than men.

It's AumSum Time.

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人間はなぜ音楽が好きなのか?| 音楽が好きな理由 (Why do humans Love Music? | #aumsum)

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    AumSum に公開 2021 年 01 月 14 日
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