Rupert's Tears

Molten glass is dripped into ice water to cool and form glass teardrops. These glass droplets, resembling tadpoles with long, thin tails, are commonly known as Rupert's Tears.

Since its discovery in the 17th century, it has been studied by curious humans for nearly 400 years because of its particularly magical properties.

Rupert's Tears

The tadpole's head can withstand pressure of about ten tons without injury.

Its head can withstand ten tons of pressure.

However, if you grab its slender tail and apply a little pressure, the entire glass tear will shatter instantly, scattering everywhere and completely disintegrating.

I was just as surprised as when I first saw a magnet when I was 5 or 6 years old.

Even a light touch on the tail will damage it.

Problem with solidified semen in men!

Regarding the issue of semen solidification

Many people think that semen is liquid, but in fact, semen can also turn into a jelly-like state.

This ability arose during biological evolution, and its purpose is naturally to increase the chances of conception.

Under normal circumstances, men excitedly complete the ejaculation process under the control of hormones, at which point the semen is in a liquid state.

After ejaculation, semen changes from a liquid state to a semi-liquid state, like jelly or gel. The main reason is that seminal vesicle fluid, an important component of semen, contains a coagulating factor that can make the originally non-viscous semen viscous.

There are two advantages:

1. This ensures that the semen will not slip out of the body during the final stages of intercourse, ensuring proper adhesion and preventing premature or rapid leakage due to excessively thin semen, which could ultimately lead to the woman's failure to conceive.

2. Before the semen reaches the deep vagina, the sperm in the semen retain their position, preventing them from rushing around and dying midway before reaching their destination, which would ultimately reduce the woman's chances of conception.

After 10 to 30 minutes, the semen begins to liquefy under the action of fibrinolytic enzymes, becoming thinner, and then the sperm can move freely and start a race with 100 million participants.

Reminder: Some men who have frequent sexual activity may still have semen that is thick and viscous, like jelly. This is because frequent sexual activity can lead to zinc deficiency. Zinc deficiency can reduce the activity of semen liquefaction enzymes, making semen difficult to liquefy. Therefore, it is recommended that men who have frequent sexual activity supplement with zinc orally to avoid semen liquefaction problems and a decline in the quality of their sex life.

tiger fur

If you shave a tiger's fur, its stripes will still be there!

Before shaving

After shaving

So that's not hair! That's a tattoo!!!

Do you know the front and back of your ID card?

Hehe, actually the side with the national emblem is the one officially certified by the government.

Regarding AIDS

If you have engaged in high-risk behavior with an HIV carrier or have been exposed, you can obtain post-exposure prophylaxis (PEP) medication from your local CDC within 72 hours to effectively prevent HIV infection!

Domestic propaganda has consistently emphasized that AIDS is not terrible, but Chinese people have a shameful misconception about AIDS, leading to fear and stigma associated with the topic. People who are not exposed to it will never know anything about AIDS except for the three routes of transmission.

Of course, some people can only recite two, one of which is why AIDS is difficult to understand—sexual transmission is the main route.

Regarding AIDS

AIDS is caused by infection with the human immunodeficiency virus (HIV). HIV is a virus that attacks the human immune system. It primarily targets CD4 T lymphocytes, the most important cells in the human immune system (an important reference>

The picture shows the Mongolian Navy flagship, the Sukhbaatar.

In his crosstalk performance, Guo Degang jokingly said that Yu Qian's father was the commander of the Mongolian Navy.

Although it is a burden, Mongolia does have a navy.

It has three boats, two cannons, one engine, and seven crew members.

They are known in the martial arts world as the "Seven Warlords of the Sea".

Is it true that Einstein did poorly in school as a child?

You've probably heard that Einstein struggled with math in elementary school, scoring only one point. He later worked hard and became one of the greatest physicists of all time.

Inspiring, right? Einstein went to elementary school in Germany, where a perfect score is 1!

German exams are graded on a 6-point scale:

1 point: sehr gut (excellent)

2 points: good

3 minutes: befriedigend (intermediate)

4 points: ausreichend (Pass)

5 points: mangelhaft (failing)

6th minute: ungenügend (difference).

And another thing! Germans mark the correct options with an "X" or "×××", it's so strange!

Trivia about oranges

You can tell the number of oranges without peeling them.

Each orange has a green stem.

Peel it open and you'll see a ring of small beans.

Look closer and count the number of them.

There are as many segments of orange as there are red beans; this one should have ten segments. However, please look closely; there seems to be an empty space in the bottom right corner.

Check if the green stem has come off, as shown in the picture below (this is the stem of another orange).

If not, then it means that there might be an underdeveloped orange in this empty space.

I opened the oranges, and yes, there were indeed ten large ones and one small one!

How crocodiles swim in deep water

People usually think that crocodiles swim.

Actually, it... is always moving.

And...like this.