Zitat aus obigem Link:
UndLeiden - Die bisher ältesten bekannten, von Urmenschen geschaffenen geometrischen Muster haben Forscher auf der indonesischen Insel Java entdeckt. Die Gravuren auf Muscheln seien zwischen 430.000 und 540.000 Jahre alt, berichten die Wissenschaftler im Fachmagazin "Nature". Die eingeritzten Linien seien damit über 300.000 Jahre älter als die bisher ältesten unbestritten menschlichen Gravuren.
http://dx.doi.org/10.1038/nature13962
Zitat aus obigem Link:
War da nicht was, liebpluto, wonach sich besonders anhand der Schalen von Weichtieren das Alter “präzise†bestimmen lässt? Wie willste denn das Ar-Ar-Verfahren kallibrieren? Etwa anhand der Lava des Vesus-Ausbruchs vom Jahre 79 n. Chr.?The manufacture of geometric engravings is generally interpreted as indicative of modern cognition and behaviour1. Key questions in the debate on the origin of such behaviour are whether this innovation is restricted to Homo sapiens, and whether it has a uniquely African origin1. Here we report on a fossil freshwater shell assemblage from the Hauptknochenschicht (‘main bone layer’) of Trinil (Java, Indonesia), the type locality of Homo erectus discovered by Eugène Dubois in 1891 (refs 2 and 3). In the Dubois collection (in the Naturalis museum, Leiden, The Netherlands) we found evidence for freshwater shellfish consumption by hominins, one unambiguous shell tool, and a shell with a geometric engraving. We dated sediment contained in the shells with 40Ar/39Ar and luminescence dating methods, obtaining a maximum age of 0.54 ± 0.10 million years and a minimum age of 0.43 ± 0.05 million years. This implies that the Trinil Hauptknochenschicht is younger than previously estimated. Together, our data indicate that the engraving was made by Homo erectus, and that it is considerably older than the oldest geometric engravings described so far4, 5. Although it is at present not possible to assess the function or meaning of the engraved shell, this discovery suggests that engraving abstract patterns was in the realm of Asian Homo erectus cognition and neuromotor control.
Selbstverständlich ist in gleicher Weise auch die “Luminescence Dating Method†auf Sand gebaut...
