This quantification of the span of human history would modify the Platonic conception in the Timaeus, making the history of the world a homogeneous and indefinite continuum, a simple reflection of the eternal return of the interlocking planetary cycles, with their conjunctions and oppositions. (religion-online.org)
It is (as far as I can tell) named after Theodor Landscheidt, a solar scientist who worked on the relationship between planetary cycles and solar cycles has been basically ignored by the scientific community (he had an H - index of 3 — which is pretty poor) but taken up enthusiastically by global warming sceptics and astrologers. (johnquiggin.com)
Can we look forward to nothing but a state of senescence at the end of the planetary cycle of hominization or, on the contrary, will it be a paroxysm of the Noosphere? (religion-online.org)