3. BGM#003

Like Wurdi Youang, erected by aboriginal… The earliest examples are markers on the… One of them is the day night cycle... 24… There's evidence that we were counting t… By locating these fixed points in the ni… So, that gives you a way of measuring so… Leo A series of pits dug in the ground. at W… The third one is how long it takes the e… If you set up a distant landmark. and li… 114. DEMO1 A00001BD 48. BGM#048 The next one is how long it takes. the m… All over the world, some of the oldest m… It goes through a cycle of phases from n…