[Fester Chugabrew]

The best estimate today is about 15 billion years.

And the worst estimate today is . . . because . . . .

[CarolinaGuitarman]

"And the worst estimate today is . . . because . . . ."

If you don't like science just say so. You want ID (creationism) to be science yet you have nothing for disdain for science.

BTW, the best estimate has not been close to 7 billion years for decades.