This is the youngest Bear Cub I have ever photographed.  The Black Bear den is visable from a parking area in Yellowstones northern route.  On warm sunny days, (above 32 degrees) the mother bear would rest her head at the entrance of the den and soak up some rays.  On April 9th of 2023 one of her small cubs joined her in the sun for a few seconds. It was so tiny and cute but already had some sharp claws.