History Seems to be Missing
It’s interesting that asteroid 163348 (2002 NN4), which is between 150-300m in length, was discovered 18 years ago, arriving in an expected path. They aren’t particularly worrying. What is worrying is something like Oumuamua, which was between 100m and 1 kilometre long and had passed within earths orbit already, went within mercury’s orbit, and was on it’s way out back past earths orbit within 1 month of it being first discovered. How many of these objects are around nobody knows as astronomers are only really starting to look for them.
Human intelligence has probably been at our current level for 300,000 years. Although the first stone tools have been discovered dating back to at least 700,000-950,000 years ago. We have history of maybe 10,000. I’ve always wondered what happened to the other 96.6% of the time, possibly up to 98% if you include Neanderthals and Denisovans, and 99% for stone tools. Just doing nothing, as the unproven assumption is that they were just itinerant primitives, grubbing roots, little more than animals, but they had religion, art, communities, travelled great distances, and were the originators of most of the grains we eat. 6,000 years ago our ancestors were moving giant blocks and creating constructions that would be a problem for most modern engineers. People are now only discovering that some of the chambers were probably used for astronomy around that time. Think who in your local community could do it now with the society we have.
If you trace back the civilizations of the world there is nothing really before 10,000 years ago worth mentioning, then somebody flipped a switch, and simultaneously within 3,000 years all around the world, civilizations started up after doing nothing for hundreds of thousands, possibly up to a million years. It was about the same time as all the megafauna seemed to have disappeared. My view is that they’ve simply been erased by events, not non-existent. Solar Flares, Asteroids, disease, climate change, super volcanoes, polar change, advanced or computer warfare; they are all candidates, perm any 2 from 7 for a bus ticket back to the stone age.
Ahmet Muhiddin Piri or as we know him as Piri Reis (Captain Piri) was an Ottoman cartographer and navigator who compiled a set of navigation maps in a book he called Kitab-ı Bahriye (The Book of Navigation.) about in 1513. He produced it from a lot of unknown sources, but probably from the same one as Juan de la Cosa in about 1500.
Both set of maps detail north America, but some of Piri’s maps also include some of south America and Antarctica. The Antarctic area shows coastlines that match them underneath the ice, so it is likely that at some point the origin of them had mapped the coat prior to the ice covering them. This was unlikely to be later than about 12,000 years ago.
Although at one point he became a privateer it’s likely that Piri himself never left the main area around the Mediterranean, so the source his maps were from other unknown people’s versions that have not been discovered since.
Cristóbal Colón or Christopher Columbus reached the Bahamas in 1492 and later got as far as Panama in about 1502, the continent of Antarctica not being discovered until 1820. Peru and Chile weren’t invaded, explored or mapped by the Spanish until 20 years later than the Piri map and even longer for Cosa.
Al-Masudi in about 954 produced a circular map of the world that although some proportions are incorrect is quite an accurate representation of a globe of the world.
We know that Vikings had found North America 800 years prior to Columbus, but there is no evidence they travelled very far south.
The sources have never been discovered, but it tends to suggest two possibilities, one, that there were sea faring civilisations that had mapped those areas around and prior to 12,000 years ago, only a small amount of information coming forward, or that unknown people visited the area and were advanced enough to work out where the land was under the ice.
There is the possibility in that sea travel was much more extensive 12,000 years ago and the large island named Atlantis may be what is under the Antarctic, a sudden shift in polar regions covering it quickly being submerged under the glaciers and ice, waiting for a similar event or global warming to uncover it again.