While you're looking up the difference between "decent" and "descent", you might want to check what an observation is in a scientific context. I guarantee you it's not what you think.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'