10 scientific cold knowledge that is really interesting if you only learn it in school

Japanese scientists have extracted protein from human feces and developed a product called dung meat. It is said to taste like beef and is 10 times more expensive than pork.

Hitler pretended to be single to attract women.

Generally speaking, happiness of love can make people gain weight, on contrary, if they lose love, it will reduce amount of fat in body.

The oldest known fossil is 3.7 billion years old.

Hugging for 20 seconds produces oxytocin, which makes other people trust you more.

According to experts, sand on moon smells like gunpowder, but when you touch it, you get the feeling that you are touching snow.

Until 1950s, all pigs were traditional black pigs, while white pigs were introduced to China later. Therefore, Zhu Bajie is a black pig.

Starfish regulate their body temperature by cutting off their arms.

People yawn to remove excess carbon dioxide from body.

Generally speaking, women's clothing buttons are on left, while men's clothing buttons, on contrary, are usually on right.