Mankind can "kill the Universe?" Little human beings, who generally live only 80, 90 years tops, come along supposedly billions of years after the Universe was created and can kill it? This, by observing 'dark matter.' Remember, mankind thought the earth was flat too, once.
So, are they talking about just our part of the Universe or the whole Universe, in which case, hello, it goes on forever! In either case, it's ridiculous!
This shows the pride of man, thinking he has that much power! Man, who in his brilliance cannot come up with anything more brilliant than riding around in metal boxes that break down and rust away. Man, who would die if he didn't excrete for a week! Man, who can hardly even navigate around his small galaxy.