Four breakthroughs that are changing our understanding of dreams

People have pondered whether dreams have a purpose throughout human history. Modern scientists are fascinated with this question too.

For a long time the science of dreams has oscillated between fringe research and the mainstream. But creative study designs and new technology are transforming it into an exciting and serious research niche.

Here are four recent breakthroughs that may pave the way for a greater understanding of dreaming.

Lucid...