When astronomers observe distant galaxies, they can tell the most of them are moving away from one another. in addition, the more distant the galaxies, the more rapidly they are likely to be moving away from each other. can you devise a hypothesis to explain these observation?

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?