Kindred skies: Ancient Greeks & Aboriginal Australians saw constellations in common (PHOTOS)
Secrets of the ancient worlds
Prague Spring: 50 years to the day – What happened & what is its legacy?
The death toll from the communist invasion has been put at between 82 and 137 people
Intriguing new theory might explain the fate of Easter Island’s civilization
However, researchers aren't ready to rewrite history just yet