Ten discoveries that no one can explain

The history of the world is full of surprising mysteries. None of us will live long enough to see them all solved. But it’s always interesting to have a look at some of the truly bizarre things which lie beneath the surface.

Moa birds were flightless birds that used to inhabit New Zealand, which became extinct around the year 1500. They were killed off, according to one theory, by the Māori people. During an expedition in the twentieth century, scientists stumbled across a very large claw from one of the birds which had somehow been incredibly well preserved for centuries.

The perfect stonework of this ancient temple complex, which was completed without the use of a single drop of mortar, is truly amazing. In some cases, it’s impossible to pass even a piece of paper between the stones. Every block, moreover, has a smooth surface and rounded corners. How was it constructed? No one knows.

Full article @ BrightSide