What do you think it means when England has 426 people per km2?

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted