Siljan Ring proved inconclusive. Drilling for natural gas was resumed in the late 2000s and continues as of mid-2012. The scientific premise for prospecting of this sort is based on the work of physicist Vladimir Kutcherov, who is cooperating with Igrene, the company financing the drilling operations. Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during
Mora (linguistics) five graphemes, because one of these graphemes (ょ) represents a Yōon, a feature on the Japanese writing system that indicates that the preceding mora is palatalized. In India, the mora was an acknowledged phenomenon well over two millennia ago in ancient Indian linguistics schools studying the dominant scholarly and religious lingua franca of Sanskrit. The mora was first expressed in India as the "mātrā". For example, the short vowel ""a"" (pronounced like a schwa) is assigned a value of one mātrā, the long vowel ""ā"" is assigned a value of two mātrās, and the compound vowel (diphthong) ""ai"" (which has