How long does it take for the earth to go through one full day/night cycle?
round to the nearest hour.

"acknowledging a right to benefit from the presence of animals requires government action to ensure human access to animals in a number of different spheres," writes jessica pierce, ph. d., in psychology today. the pragmatic meaning of the term "right" in this statement is

The image shows embryos of three vertebrate classes

Long term exposure to waves can cause sunburns and skin cancer.