The ancient Egyptians were the first to use keys in the world. Their lock is to insert a wooden door bolt into a slot, and there is a wooden bolt on the top of the slot. After the door bolt is inserted into the groove, the wooden bolt will be inserted into the hole of the door bolt. In this way, the bolt of the door is firm and must be opened with a key.

Because the Egyptian lock can only be used on the side with the door bolt, which is not conducive to opening and closing flexibly, on this basis, the Greeks developed a lock that can be opened from the other side. The key made by the Greeks is a curved wooden stick, which is very similar to the small sickle used by farmers in shape and size. But there are also some keys that are 3 feet long and must be carried on their shoulders to move. They are quite heavy.

Skeleton key is the key with only the most basic skeleton structure. Able to open all locks. Today we have collected some unique Skeleton key tattoos. I hope these tattoos can inspire you.

Source: @0uchless

We must all know regular polyhedron, but in people’s mind, it must be possible to have as many faces as possible, but in fact, regular polyhedron can only have 20 faces at most. All faces of a regular polyhedron are congruent regular polygons, and all polyhedral angles are congruent polyhedral angles. Among them, the tetrahedron with the least number of faces and the icosahedron with the most number of faces.

Regular icosahedron is a regular polyhedron composed of 20 equilateral triangles, with 12 vertices, 30 edges and 20 faces. D20 is a positive icosahedron marked with numbers. Today we collected some D20 tattoos. I hope these tattoos can give you inspiration.

Source: @arizzila

Plum is a kind of sour, sweet and delicious fruit. It usually ripens in summer. Therefore, we can see a lot of fresh plums in July and August. Plums are beautiful and exquisite in shape. They taste sweet and sour. They are a kind of fruit that people like to eat very much.

Plum tastes sour. Many people feel afraid to eat it at a bite. In fact, some plums are good for our health. I suggest you can eat some plums at ordinary times. Plum contains a lot of fruit acid, which can accelerate the peristalsis of our intestines and stomach. Therefore, plum has the effect of promoting digestion. In addition, because plum tastes sour, it can also help people improve their appetite.

Source: @1sle_tattoo

Crickets living in the wild generally feed on buds, leaves and roots. In addition to all kinds of fresh vegetables and fruits, the breeder will also choose some food to make a rich nutritional meal in proportion.

Crickets chirp for food or for their own territory. They intimidate each other by shouting and swear their attitude of safeguarding sovereignty. If someone encroaches on their territory, they will shout to scare off the opposing hair.

Source: @113ink

Coyote is a carnivore of canine family in North America. Its body shape is similar to that of domestic shepherd dogs. More than 200 years ago, their activity area was limited to the northwest of the United States, but it has expanded to almost the whole of North America.

Coyotes used to be active during the day, but under the pressure of human activities, they have mainly appeared and haunted at night. Coyotes live about 10 years, and the highest record is 18 years.

Coyotes are not as good as wolves in groups. Most hunting is done independently. Sometimes small families cooperate. Mainly at night, but also during the day. Will dig their own holes, but prefer to occupy the burrows of marmots and badgers for nothing.

Source: @alefarrera.tattoo