Spherical Worlds was created in 1996.
Spherical Worlds happened in 1996.
Spherical Harmonic was created in 2001-12.
Still Life with Spherical Mirror was created in 1934.
When Worlds Collide was created in 1933.
Evolution Worlds was created in 2002.
On the Plurality of Worlds was created in 1986.
The Scoundrel Worlds was created in 2003.
Between the Worlds was created in 2003.
Cyan Worlds was created in 1987.
Forgotten Worlds was created in 1988.
Of Worlds Beyond was created in 1947.
Of Other Worlds was created in 1966.