Who wrote to fdr in the summer of 1939 alerting him to a new form of energy

Do humans change their physical environment to adapt or do humans adapt themselves to their physical environment?

He u. s. constitution (1787) establishes a national legislature with powers to “create national law”, a national executive with the power to “enforce national law”, and a national judiciary branch with the power to “interpret national and state policies” to see whether or not they violate the national constitution. this term describes the division of governmental authority into semi-independent bodies?

How did rituals maintain sumerian society