THIS MONTH, AS THE DAYS GROW SHORTER, AND WINTER LOOMS, WE POKE AROUND IN THE PENUMBRAE AND CONTEMPLATE THE EPHEMERAL, ENCHANTING NATURE OF THE PLAY OF LIGHT AND SILHOUETTED FORMS THAT ARE THE MAGICAL STUFF OF SHADOWS. EVEN A LITTLE MOUSE CAN CAST ONE, BUT THINK BIG, LIKE THE LATE ASTROPHYSICIST STEPHEN HAWKING, WHO ONCE OBSERVED: “THERE COULD BE SHADOW GALAXIES, SHADOW STARS, AND EVEN SHADOW PEOPLE.”