10 mysteries in nature that scientists can't fully explain

• Some of the most beautiful sights in nature are also mysterious. • There are 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 gelatinous blobs found on tree branches, nature holds countless secrets that scientists are still trying to figure out.

While people have cited UFOs or legendary creatures to explain some aspects of these unusual sights, scientists have called on physics, genetic testing, and other scientific methods to develop theories.

Such research has gone a long way in solving some of these mysteries, but often, questions still remain.

Here are 10 natural mysteries across the world that scientists have yet to fully