It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
The ruins of the ancient cities of Mohenjo-Daro and Harappa are extremely radioactive.
For example, the 134Cs/137Cs ratio provides an easy method of distinguishing between fallout from a bomb and the fission products from a power reactor. Almost no Cs-134 is formed by nuclear fission (because xenon-134 is stable). The 134Cs is formed by the neutron activation of the stable 133Cs which is formed by the decay of isotopes in the isobar (A = 133). so in a momentary criticality by the time that the neutron flux becomes zero too little time will have passed for any 133Cs to be present. While in a power reactor plenty of time exists for the decay of the isotopes in the isobar to form 133Cs, the 133Cs thus formed can then be activated to form 134Cs only if the time between the start and the end of the criticality is long.
According to Jiri Hala's textbook, the radioactivity in the fission product mixture in an atom bomb is mostly caused by short-lived isotopes such as I-131 and Ba-140. After about four months Ce-141, Zr-95/Nb-95, and Sr-89 represent the largest share of radioactive material. After two to three years, Ce-144/Pr-144, Ru-106/Rh-106, and Promethium-147 are the bulk of the radioactivity. After a few years, the radiation is dominated by Strontium-90 and Caesium-137, whereas in the period between 10,000 and a million years it is Technetium-99 that dominates. .
Technetium-99 is produced by the nuclear fission of both uranium-235 and plutonium-239. It is therefore present in radioactive waste and in the nuclear fallout of fission bomb explosions. Its decay, measured in becquerels per amount of spent fuel, is dominant after about 104 to 106 years after the creation of the nuclear waste. From 1945 to 1994, an estimated 160 TBq (about 250 kg) of technetium-99 was released into the environment by atmospheric nuclear tests.[
I think its very likely. Scientist think we as humans are at the pinicle of our power now, who's to say that all this hasn't happened before. Some say the worlds civilizations are only 8,000 years old. But many artifacts have been found over the years that point to a far distant super civilzation.
Originally posted by Jspencer98
reply to post by Ph0en1x
Good find! Most likely no, unless some kinda alien war
Originally posted by VelvetSplash
Did you purposely not put this in the Ancient Civilisations sub-forum for fear of getting shot down in flames?
Originally posted by ADMX101
Ever wonder if the world just goes on like it is now for a million or two years then theres a technology revolution around the time 99% of the earths population gets wiped out by a natural or man made disaster? Followed by about 100 million years of just thousands of people repopulating the planet and becoming civilized again. This could have happened several times in the 4.5 billion years earths been around...
Originally posted by captainnotsoobvious
also telling that the main proponent of this "theory" online is SELLING a book about it...