Science can show us the workings of the universe in ways we could never once have imagined, and it can change our perspective on that universe radically by doing so. But it can‘t tell us what matters in our human lives, and why, and neither can it tell us why we see what we see, and feel what we feel, and what we should do about any of that. Science might be able to tell us how to resurrect a mammoth, but it can never tell us whether we should.