A century ago, physics breakthroughs came in rapid sequence. There was quantum mechanics and Einstein’s theories of space and time, lots of new particles, two new nuclear forces, and eventually the standard model of particle physics. This progress and its technological applications commanded respect, if not outright fear.
For the 10 years they were together, Kristen de Marco and her terrier Gracie were inseparable. De Marco brought her dog to work each day, and routinely left dinners and parties early to rush home to her; she skipped her 20th high-school reunion because Gracie was sick and none of the available hotels could accommodate a dog.