Surrounded by the same woods, not to mention ordinary people, even experienced hunters may get lost. Without a compass, it is really difficult to identify the direction.

"Can you see the growth rings?" Leonardo made a suggestion, which he had seen in a storybook when he was a child.

Unexpectedly, Bi Fang shook his head: "In fact, this can only be regarded as a scientific phenomenon, used to increase knowledge, but in practical applications, it may be very embarrassing. If you want to see the growth rings, the first question is how to find them

Annual rings.”

"Aren't there trees all over here?" Leonardo pointed to the trees around him, not quite believing it.

It's not easy to see the growth rings. Just cut down a random tree, right?

"Do you have to cut down a tree every time you walk to identify the direction? Although there is no problem in doing so if you are really lost, the cost is too high, it requires a lot of physical strength and time, and you have to cut it strong enough.

Only by using a large tree can we ensure that we can see clearly." Bi Fang said bluntly.

"If you want to find naturally broken trees, it may be even more disappointing. Unless it is an economic forest farm or in the real wild, 99% of those broken trees are rotten and broken, and there is no complete cross section at all.

, and the heart of the tree is basically black, let alone the growth rings.”

Leonardo's suggestion of growth rings was ruthlessly passed, which made him a little frustrated.

He discovered that he knew nothing about the wilderness.

Without a compass or sunlight, I can't tell the direction at all.

As if seeing Leonardo's thoughts, Bi Fang smiled: "Actually, it's a good idea to let plants indicate the direction. Plants generally have the characteristic of growing towards sunlight."

"Thus, the flowers and most leaves of plants grow abundantly on the sunny side, facing south in the northern hemisphere and north in the southern hemisphere."

"In addition, there is moss growing on tree trunks. The side facing the sun will be greener and grow more abundantly, while the corresponding side may turn yellow or brown."

"Trees with branches will have denser branches and leaves on the south side of the trunk."

Bi Fang kicked the moss on the big tree nearby. Leonardo squinted and looked back and forth, and found that the colors seemed to be really different?

One side is obviously greener, while the other side is slightly yellowish.

But if you look at whether the leaves are abundant or not, it is difficult to tell. Leonardo felt that it was the same no matter how he looked at it, and he struggled: "Ordinary people can only see the color of moss. What if I am color blind?"

Bi Fang rolled his eyes: "You are really good at looking for trouble, bring your watch!"

Leonardo was stunned, but he still took off his watch obediently: "You want to use the sun and the hands of the watch to determine the direction? I know this, but we can't see the sun."

He pointed upward and the camera showed.

The dense leaves obscured the entire sky, making it impossible to see where the sun was.

"How can the sun be such an inconvenience?" Bi Fang turned over the watch. He didn't understand watches and didn't know the value of the watch. He asked, "Can I take it apart?"

"Take it apart as you like, I just use it to tell the time." Leonardo waved his hand. He was going to the jungle. How could he bring a particularly valuable and meaningful watch? If it got bumped, it would be a loss.

After receiving permission, Bi Fang was not polite. He looked at the watch cover and found that it was indeed sold on the street. He pried open the cover with his fingernails, poured out all the internal parts, and then found the longest second hand in his palm.

Putting the remaining parts into Leonardo's hands, Bifang rubbed the second hand directly on his hair, pulled off a leaf at the same time, knelt down next to the black puddle, then placed the second hand on the leaf and put it into the water.

In the depression.

The leaves entered the water, creating ripples. Finally, under the gaze of millions of people, they slowly circled and finally stopped at a certain angle.

Bi Fang looked back and forth, pointed in the direction of the long needle and said, "This is north and south."
Chapter completed!