Mesopotamia is a word that refers to land between two rivers; the names of the rivers are:

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

portugal

explanation:

there are 28 days in feb.