Regularly blowing through a conch shell for six months significantly improved sleep among a small group of people with sleep apnea, researchers in India found.

Researchers say that this offers a simple, low-cost and comfortable breathing technique that could help reduce symptoms without machines or medication.

An intriguing new study has found that symptoms of obstructive sleep apnea (OSA) could be significantly reduced by regular sessions of blowing through a conch shell. And it's not the first time scientists have explored this.