At the end of the procession, there was a terrible scream, and the people around them suddenly seemed to be boiling water to explode into a pot, splashing everywhere, no longer controlled by the environment.

"What happened?" Leo jumped out in a hurry, the scream just now made him particularly uneasy, although the area of this forest is not very large, anything can happen.

One soldier swallowed and pointed to the ground, "Shadow, my shadow, my shadow is actually in front of me!" ”

After hearing this, Changsun Yuanhong and the others immediately breathed a sigh of relief, and they couldn't wait to dismantle that little soldier into eight pieces, isn't it just a shadow thing? As for yelling like that?

Leo's face changed greatly, and after a few simple whispers with Harsh Reproach and Elder Cui, he quickly came to Angel and the others, and said with a solemn face, "Maybe we won't meet those bandits." ”

The eldest grandson Yuanhong was stunned for a moment, but he didn't feel relieved, and his intuition told him that the next thing would be something more terrible than encountering an enemy attack, "Will there be any problems with the road we take?" ”

The eldest grandson Yuanhong went straight to the point, and didn't want to talk to Leo Do, the little soldiers just now were not nonsense, then they were in big trouble.

Leo took a deep breath and explained helplessly, "The person just now, I saw his shadow in front of his body, but theoretically speaking, this kind of thing is generally not true, you stand in front of the moon, and the shadow can only be behind you, not in front of you." ”

"So, is there really a fool of the devil?" The eldest grandson Yuanhong suppressed the anger in his heart, and encountered everything along the way, and at this time there was a ghost saying, and his majesty the emperor was in a good mood to call it a ghost.

Conceited men, especially those who have believed in being ordained by heaven since ancient times, do not believe in any ghosts and gods, because they are orthodox between heaven and earth, and no demons and monsters can get close to them.

Under everyone's gaze, Leo nodded cautiously, and shook his head quickly, "The road we are taking now is the easiest way to get into trouble, many things cannot be explained, for example, the shadow under the moon is very abnormal, sometimes, even if you bury a dead person on the side of the road, you will see him sitting next to the grave the next morning, as if he crawled out of the grave." Again, the biggest problem here is that you don't have water or food, you can't drink water on this road, you can't eat wild vegetables, you can't see any birds and birds, but you can hear the birds, there are no signs marked with ropes along the way, maybe you will never be able to walk out of this forest, this kind of thing is commonly known as ghosts hitting walls in your place. But whether you believe these things or not, I never believe that there are ghosts and gods in this world. ”

Leo's words made the eldest grandson Yuanhong think about it and then move, the words of ghosts and gods are not credible, but this kind of bizarre thing is not groundless, the mercenary group has lived here for so long, but it is also ......

The eldest grandson, Yuanhong, suddenly had some doubts, "Captain Leo, have you walked this road?" ”

Leo nodded, "Walk through once, at that time, we came in to find someone." At that time, no one knew what was going to happen, so we brought plenty of dry food, tied ropes around our bodies, and walked around the woods for three days and three nights before we found our employer, but we did not make it to the other end of the woods, but returned. Judging from the way the rope was wound, we found that we had walked for two days, but it was only a circle in the forest, and even the compass was useless. ”

The earth is a big magnet. The two poles of the Earth are close to the geographic south pole and the geographic north pole, respectively. When the magnets on the earth's surface can rotate freely, they will indicate the principle of north and south due to the nature of magnets that are repelled by the same sex and attracted by opposite sexes.

The compass, also known as the north arrow, is mainly composed of a magnetic needle mounted on the shaft, the magnetic needle can rotate freely under the action of the natural geomagnetic field and remain in the tangent direction of the magnetic meridian, the north pole of the magnetic needle points to the north pole of geography, and the direction can be identified by using this performance. It is commonly used in navigation, geodesy, travel and military applications.

The compass is the result of the ancient Han working people's long-term practice of understanding the magnetism of objects. As one of the four great inventions of ancient China, its invention has played an immeasurable role in the development of human science and technology and civilization. In ancient China, the compass was first used for rituals, ceremonies, military affairs, divination and feng shui to determine directions.

The application of the compass in navigation has greatly promoted the geographical discoveries and maritime trade, the invention of the compass originated from the study of how the ancient Chinese people oriented, and also showed that the ancients attached great importance to the problem of how to orient, for which the compass was known as one of the four great inventions of ancient China.

The ancient Chinese used the compass for military and navigational activities, and was also used for Kanyushu, and later passed on to Europe, playing an irreplaceable and important role in European navigation activities and geographical discoveries, and in the invention of navigation technology, the compass is also the most important single invention.

There is no compass in this era, but Angel has such an ability to bring the compass into this world a long time ago, and there will be no shortage of nautical compasses to open the sea, but the invincible compass suddenly failed, which is a huge blow to the military.

Angel was stunned for a moment after hearing this, looking at the ground under her feet, she inevitably had some calculations in her heart, and the magnetic meridian changes with the changes of the four seasons throughout the year. First, on the day of the spring and autumn equinoxes, the magnetic meridian coincides with the meridian and the meridian of the earth, and the compass points directly to the north and south poles of the earth, and the error is only 0.08° eccentricity of the earth's axis, which is negligible.

On the day of the summer solstice and winter solstice, the magnetic meridian and the meridian do not coincide and the partial magnetic angle is the largest, and the maximum deviation is plus or minus 23.26 °, that is to say, the partial magnetic point near the north and south poles of the earth is the largest, and the circumference of the earth is divided by the angle of 365 ° at plus or minus 23 °, which is equal to the distance between the polar poles and the north and south poles.

There is only one thing that can derail the compass, which is the magnet of the positive and negative poles, in other words, the natural magnet mountain, which has a special role in this natural ore.

Although it brings great convenience to people's lives, it also brings a lot of disadvantages, like what Leo just said, wild vegetables, weeds and water sources will have toxins, because there are such minerals buried underneath, which will also affect people's sense of direction, some animals will selectively avoid here, which is why you can hear the birds, but you can't see the birds.