RT @Unexplained: Sounds produced by dropping a brick of ice down a 450m bore hole https://t.co/UBgiTyRzBI 0 atbildes

	Māris Antons (2020-02-10 17:07:33) @twitter	RT @Unexplained: Sounds produced by dropping a brick of ice down a 450m bore hole https://t.co/UBgiTyRzBI