Earth is filled with wonders, but some defy all explanation. In this video, we explore 15 of the most mysterious landforms on Earth that continue to puzzle scientists and researchers.

Zare and his colleagues say that the energy required could have come from "microlightning," incredibly small flickers of electricity passing between droplets in moving sprays of water on early Earth.

The origin of life on Earth has long remained a mystery. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Cosmic dust may have helped to ...