It remained low until the discovery of oil in 1947.

Another one was thrown into the river, where it lay until its discovery in 1988.

This lasted until the discovery of gold in the area and the subsequent rush.

Northern white rhinos were unknown to the western world until their discovery in 1903.

However they could not be proven until the discovery of Thompson's ledger, a half a century later.

Until the discovery of antibiotics in the 1940's, tuberculosis was usually fatal.

However, they were not recognized as a distinct population until the discovery of 2060 Chiron in 1977.

"Type 1 diabetes was, until the discovery of insulin, a death sentence within two years," he wrote later.

It was probably stashed along other items and forgotten for years until its recent discovery by the owner.

However, the city did not engage in any serious urban development strategy until the discovery of oil in 1962.