Quotes from Philip Plait

They say that even the brightest star won't shine forever. But in fact, the brightest star would live the shortest amount of time. Feel free to extract whatever life lesson you want from that.

they had thrived on Earth for millions of years, but their own waste killed them.

As a matter of fact, sometimes it pays not to nitpick; when you do, pseudoscience supporters will simply throw more facts and figures at you, hoping either to dazzle you with their database of knowledge or to confuse you beyond hope of reaching any rational conclusion.

But how luminous are they—literally, how much light are they emitting? This depends on how massive they are: The mass of a star is the single greatest factor in how it lives its life, including its luminosity and its life span.