It was discovered in the mid 1800's to 1900's.
it was discovered in the 1930's
It was discovered in the 1860's.
Pyrite was discovered during the 1600's and the 1700's
They were discovered in the late 70's. But they started in the early 70's.
shopping was discovered between the mid 1700's and the early 1800's
Vacuoles were discovered between the late 1600's and early 1700's.
Joseph smith discovered it in the 1700's
It was discovered in the 1500's by an Egyptian.
Saskatchewan was discovered in 1820's.
Discovered in 1886, but not isolated until the 1950's.
The first quasars were discovered in the 1950's