It flickers or appears to flicker because of the long distance it hast to travel
<span>This barrier is known as reproductive isolation and and generally occurs when two species have incompatible genitalia which are unable to function together. It can also occur when the sperm of the male species is unable to be fertilized by the female, regardless of genital compatibility.</span>
Because water can dent things. You seen the movie 2012? Think of the aftermath. Think about japan. The canyons had to do with something about water