THE PHENOMENON OF GHOST APPLES.

“I guess it was just cold enough that the ice covering the apple hadn’t melted yet, but it was warm enough that the apple inside turned to complete mush (apples have a lower freezing point than water),” Sietsema told CNN. “And when I pruned a tree it would be shaken in the process, and the mush would slip out of the bottom of the ‘ghost apple’,” he added.