If extraterrestrials are looking at our Earth through a large telescope right now, most likely they are seeing back to… the early days of the colonial period in North America. The speed of light is not too fast. It will take 300 or 400 years for an image to reach the extraterrestrial beings. But it’s quite a different story when it comes to thousands and millions of years. Continue reading
There are two kinds of false discrimination: when non-ferrous targets are detected as iron, or when ferrous items have non-ferrous indications. In the first case, you will miss finds. In the second case, you will exert yourself digging empty holes. Which option do you choose? Continue reading