Later observations by the civilizations of The Great Voyage Organization confirmed this: short-distance Quantum Macro Tunneling really was an instinct possessed by every living creature on this "Star Ring."
In the eyes of two-dimensional organisms, there was nothing remarkable about this ability. Everyone could do it; those who could not had no way to live on the planet.
Oh, that was not entirely right. There were some that could not—but they were not animals. They were plants.
After careful probing, the scientists discovered that the plants growing on the horizon of the two-dimensional planet did not overlap. Though their linear trunks and branches also gave the impression of "lush foliage," they could not pass through one another's bodies and penetrate to the other side.
The trees on the two-dimensional planet were rather interesting too. For most trees, their so-called "lush foliage," when viewed from a three-dimensional perspective, was a tangled mass of interwoven threads. Yet the Gourd People, as two-dimensional beings, could rely on their instincts to move through this mess.
In the captured fragments of two-dimensional Gourd People's daily lives, Yue Yuan had once seen such a scene: a group of two-dimensional Gourd People children playing and roughhousing in a forest. They were just like characters in a two-dimensional cartoon, easily passing through tree after tree that blocked their path, through branch after branch and leaf after leaf shaped like lines, weaving back and forth through the forest like a tangled skein.
They looked like a group of ghosts at play.
There was another novel phenomenon. While observing the daily lives of the two-dimensional people, Yue Yuan discovered that the two-dimensional Gourd People were actually completely bilaterally symmetrical animals. They also had a power organ similar to a heart, but the heart was located right in the center of