June
30
/ 2016
Could ancient megalithic passage graves in Portugal dating as far back as 8000 BC have doubled as astronomical observatories? A team of researchers studying the ancient tombs thinks so, and have even suggested that the megaliths provided optical opportunities for the ancient observers, effectively acting as ‘telescopes’ without lenses. The idea behind the researchers’ speculations is that the passages of the tombs, which show just a small patch of sky on the horizon, would have been dark. Anyone sitting inside them would have had an early view of rising stars. The reduced ambient light in the passages around twilight would have made the stars more visible to the naked eye. Telescopes did not come until much later (1608 AD), but
