9 stunning natural mysteries scientists can't fully explain

9 stunning natural mysteries scientists can't fully explain

The bright-pink Lake Hillier in Western Australia.matteo_it/ShutterstockSome of the most beautiful sights in nature are also mysterious.These include sand dunes that seem to sing and a dazzlingly pink lake in Australia.While researchers have theories for many of them, questions remain.Whether it's the cause of a flamingo-pink lake or the source of splotchy circles in the desert, nature holds countless secrets that scientists are still trying to …