Other contributors have said "Is there a palestine?" is the same question as "Does Palestine exist?" If you believe that these are not asking the same thing and should be answered differently, click here
The idea of "countries" existing at all is a very new notion, first of all. (read Benedict Anderson's "Imagined Communities" about this) Most countries have not existed for more than 200 years, and...
-273 Celsius, or absolute zero has never existed by conventional thermodynamic means. It is the kown point at which entropy is 0, but it has never been reached.