Natural is the opposite of unnatural.
Unnatural History was created in 1983.
Unnatural Causes was created in 1967.
Unnatural Death was created in 1927.
The way to spell the word is unnatural.
Unnatural Causes has 236 pages.
The dark, ominous clouds gave an unnatural appearance to the valley below. The sound of his voice through the microphone was unnatural. The great strength of the Incredible Hulk is unnatural.
Using unnatural color combinations. for apex :)
Unnatural History III was created in 1997.
Unnatural History - Doctor Who - was created in 1999.
Unnatural Exposure - novel - was created in 1997.
For the Term of Their Unnatural Lives was created in 2004.