Chapter OneCave of the Bears
"Watch your head," said paleontologist Tim Heaton, ducking as he led the way down into the fissure in the steep rock face, leaving the sunshine and warmth behind. It was cold, damp, and quiet. Underground, away from the droning of the big gasoline generator, there was only the barest murmur of seeping water. But we could see well enough. Thick electrical cables ran into the cave to a few lights that were strung along one side.
We were on Prince of Wales Island, Alaska, in the summer of 1999. The main chamber was tiny and cramped, only about ten feet wide, with a ceiling so low in places that we...