All the wells drilled in state waters were dry holes.

Scientists are not certain exactly how wells drilled into the church land would affect Yellowstone's features.

Since then, over 137 wells have been drilled, each serving approximately 1,000-1,500 people.

Six consecutive wells were drilled, each producing in excess of 4,000 barrels per day.

A decade ago, the norm was 1 producing well for each 10 exploratory wells drilled, according to the department.

In most states, wells drilled before 1967 have historical numbers.

The last four wells drilled are yet to be tested.

Development of the field was fast, with 55 new wells drilled in 1949, and another 20 in 1950.

Nonetheless, all six wells drilled since the 1970s have been dry.

Other wells drilled nearby also hit substantial quantities of oil - it seemed to be everywhere.