Big Bang Theory Quote
Sheldon: (singing to the melody of "99 Bottles of Beer") Six times ten to the eighth atoms of radium in a lead jar/Six times ten to the eighth atoms of radium/If the half-life of radium should happen to pass/Three times ten to the eighth atoms of radium in a lead jar.
Penny: Really hope you're almost to zero.
Sheldon: No, see, that's the beauty of half-lives; it's impossible to determine when you'll arrive at zero. It's like "Wheels on the Bus" if the bus had an unknowable number of parts.
Amy: Yeah, we're gonna need more coffee.
Penny: Yep. I'm with you. Leonard, coffee?
Leonard: Black and strong, like Luke Cage.
Penny: I'm too tired to even be disturbed by that.
Quote from S12E23 - The Change Constant