These eerie howling noises could be the sound of aliens making contact, according to the woman who recorded them.
Photographer Svetlana Kuzina was walking on the frozen water on a Siberian lake when she heard the terrifying wails.
Posting about the experience, she wrote: "The mournful howling sounds made me really feel aliens must be close by.
"Finally - I thought, 'I am on the verge of contact with extraterrestrial minds!'"
She was frightened the first time she heard the "alien-like" sounds in the middle of the night while photographing shooting stars at Lake Ak-Kem.