If aliens came?
We did not detect Wed
Zhu Jin, we use the radio may have served to send the waves keep the earth “can be difficult to hide.” However, the aliens if they came in? The answer is uncertain.
Zhu Jin can survive entirely appropriate in their interstellar environment, has achieved an advanced civilization. The extent of their skill level, simple enough, the earth does not exceed the barrier to reach the thousands.
Your capacity of the Earth, and the wisdom of such an alien if the whole is far beyond our imagination. Jin Zhu, regardless of the alien technology of what they need to explore district level, the district can not stop people, they do not need to hide. Any particular reason to hide your identity aliens, we can not find them. “There’s no flying saucer ride, even if we take to improve aviation aircraft will be able to detect.”