"I like to think about the first law of thermodynamics, that no energy in the universe is created and [...n]one is destroyed. "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. And every part of us now was once a part of some other thing - a moon, a storm cloud, a mammoth. [A] monkey. [...] Thousands and thousands of other beautiful things that were just as terrified to die as we are. We gave them new life, a good one, I hope."