Neil Shubin is an accomplished scientist, gifted storyteller and intrepid adventurer. He brings all these assets to bear against a daunting challenge: to tell the story of our long, strange, and wondrous trip from the first moment of the Big Bang to our most recent heartbeats. “The Universe Within” is that story. It’s the story of the Big Bang. It’s the story of hydrogen, born in the late stages of the Big Bang, and that composes 90 percent of the known matter in the universe (and composes about two-thirds of the atoms in our own bodies). It’s the story of …