The 10 Most Incredible Archaeological Discoveries That Scientists Still Cannot Explain!

The glimpse into the past is breathtaking, revealing - and above all incomplete! And while most artifacts help us to better understand the lives of our ancestors, others do the exact opposite! The unique discoveries we're about to show you also fall into this confusing category: after all, what's an astronaut doing on a 7th century grave cover? Why does a simple coin have the potential to overturn the entire historical record? And above all, how could people thousands of years ago have known what dinosaurs looked like?