Hi guys.

Can you guess the title of my next video?

Something's missing.

Sugar?

Salt?

No.

It's saliva.

Hurry up.

Write your guess in the comments section below.

How many brains do you have dude?

No.

Just one.

An octopus has a decentralized nervous system with majority of its neurons residing in its arms.

These neurons help the arms to independently taste, touch and control basic motions.

Without consulting the actual brain in its head.

Thus, it gives an impression of having 9 brains, when in reality, it only has one.

Topic: Nuclear fusion.

Why is nuclear fusion not used to generate electricity?

You really want to know the answer to this, right?

But wait.

Before answering the question, let us understand what is meant by nuclear fusion.

When two lighter nuclei combine to form a heavy nucleus, a large amount of energy is released.

This process is called nuclear fusion.

Where does this nuclear fusion take place?

You think that it takes place in a laboratory?

No, you are absolutely wrong.

Nuclear fusion takes place in the sun.

The nuclei of two hydrogen atoms join together to form a heavy nucleus of helium.

With the release of a large amount of energy.

How do you think this energy reaches us?

No.

It does not reach us through power lines.

Wait, I will tell you.

The energy released after nuclear fusion reaches us in the form of sunlight, ultraviolet radiations, heat, etc.

Hey.

But we are already producing electricity with the help of nuclear fission.

So, why do we require nuclear fusion?

For this, you need to first understand the difference between nuclear fusion and nuclear fission.

As we already know,

Nuclear fusion is the fusion of two lighter nuclei with the release of a large amount of energy.

The exact opposite process happens in nuclear fission.

Here, a heavier nucleus splits into two lighter nuclei, releasing a large amount of energy.

This process of fission is used in nuclear power plants.

Where a heavy nucleus of uranium is split into lighter nuclei.

The energy that is released in this is used to generate electricity.

However, there is a major disadvantage of nuclear fission.

Wondering what it is?

The major disadvantage is that uranium is a radioactive element.

When uranium undergoes fission, it generates radioactive waste along with energy.

This radioactive waste is very harmful for most lifeforms and the environment.

Hence, we need to find a clean and safe source of energy to generate electricity.

What source would that be?

Would it be nuclear fusion?

You are right.

Then why are we not harnessing the energy of nuclear fusion to produce electricity?

This is because, for nuclear fusion, two conditions are required.

They are high pressure and high temperature.

Only when these conditions are met, can the two nuclei travel at very high speeds resulting in collision.

On earth, it is extremely difficult to create such high pressure and temperature.

Even if we are somehow able to create these conditions, the question is how will we control them?

As there are many questions unanswered and unsolved.

We have not yet succeeded in using nuclear fusion in the production of electricity.

Topic: Human tears.

Why do onions make you cry?

Because they cannot crack a joke.

No.

Onions consist of amino acid sulfoxides.

When we cut an onion, millions of onions cells rupture.

Releasing the amino acid sulfoxides along with some special enzymes.

These special enzymes react with amino acid sulfoxides.

To form a chemical called Syn-propanethial-S-oxide.

This chemical is volatile, that is, it easily evaporates at normal temperature, forming a gas.

When this gas reaches our eyes.

It reacts with the substance that keeps our eyes lubricated and forms mild sulfuric acid.

What?

An acid in my eyes.

Absolutely.

This sulfuric acid gives us a burning sensation.

Now, in order to wash off this acid, our lacrimal glands produce a disinfecting liquid.

But when our eyes cannot hold any extra amount of disinfecting liquid.

It starts to fall down, making us cry.

What is sleep paralysis?

No idea.

Sleep paralysis is a condition in which we are conscious but temporarily unable to move or speak.

It can usually occur when we suddenly wake up during REM sleep.

What is REM sleep?

Basically, there are four stages of sleep.

One of them is Rapid eye movement sleep, that is, REM sleep.

In this stage, we dream.

Researchers suggest that when we enter REM sleep, two chemicals.

Glycine and GABA "switch off" the activity of cells in the brain that allow our muscles to move.

Oh no.

This is so bad.

No!!

It is actually beneficial.

Because paralyzed muscles prevent us from enacting our dreams in reality and getting hurt.

However, sometimes we suddenly wake up during REM sleep.

But if glycine and GABA are still active, we are temporarily unable to move.

Even though we are conscious.

This is called sleep paralysis.

Why are sunsets red?

Because sunsets are romantic.

No.

It is basically because of scattering of light in the atmosphere.

Our atmosphere is primarily composed of tiny nitrogen and oxygen particles.

Now usually, when sunlight comprising of seven colors passes through the atmosphere.

It hits the nitrogen and oxygen particles.

These particles scatter blue and violet light more as compared to red.

Orange and other colored lights.

Hence, mostly bluish light enters our eyes, thus making the sky to usually appear blue.

However, during sunset, the sunlight must pass through a greater distance in the earth's atmosphere

Causing it to pass through more particles.

As a result, most of the blue and violet light get scattered before they reach our eyes.

Due to this, the less scattered light like red or orange reaches our eyes.

Making the sunset appear red.