energy is neither created nor destroyed
Jemma Simmons: I like to think about the first law of thermodynamics, that no energy in the universe is created and… none is destroyed.
Jemma Simmons, Leo Fitz: None is destroyed.
Jemma Simmons: That means that every bit of energy inside us, every particle will go on to be a part of something else. Maybe live as a dragonfish, a microbe, maybe burn in a supernova ten billion years from now. And every part of us now was once a part of some other thing – a moon, a storm cloud, a mammoth.
Leo Fitz: A monkey.
Jemma Simmons: [Smiles] A monkey. Thousands and thousands of other beautiful things that were just as terrified to die as we are. We gave them new life. Good one, I hope.