# Excavations started in 1991 at the Blombos Cave site on the Southern coast of South Africa unearthed a 75,000 year old piece of ocher engraved with hourglass figures, patterns that Schuster identified as basic units of a graphic system used to depict genealogical relations.
Carl Sagan | Carl Jung | Simon & Schuster | Carl Orff | Carl Maria von Weber | Carl Lewis | Carl Zeiss AG | Carl Linnaeus | Carl Sandburg | Carl XVI Gustaf of Sweden | Carl Levin | Carl Zeiss | Carl Michael Bellman | Carl Friedrich Gauss | Carl Froch | Carl Perkins | Carl von Clausewitz | Carl Reiner | Carl Hancock Rux | Carl Gustaf Emil Mannerheim | Carl Edwards | Carl Cox | Carl Bildt | Carl Barks | Carl Wilson | Carl Schmitt | Carl Milles | Carl Crawford | Carl Bernstein | Carl Andre |