No, I don’t find it odd at all Chakka - and neither would you if you thought about it for more than 5 seconds. How would you expect anything to have been recorded, other than in writing, before the mid-19th century at the earliest? Any evidence prior to that time can only have been anecdotal and therefore the millennia you talk about are irrelevant. Furthermore, we have no idea what causes this phenomena. It could be something completely outside of our current sphere of knowledge, and if it is, then clearly we wouldn’t yet possess the capability of recording it. I’m not an expert, but I am acutely aware that we are very new to the world of science and have a very long way to go before we are even close to reaching our potential - and I’m absolutely gobsmacked that anyone should imagine otherwise.