You’ve seen the perfect arcs of boiling water solidified mid-throw, and perhaps this frozen speeding sign that duplicated itself over 2019’s Polar Vortex, but have you seen ghost apples? Thanks to a Facebook post by farm manager Andrew Sietsma, the phenomenon has captivated the internet, leaving commenters to marvel at the sight of these glass-like specimens that remain after apples have rotted from their icy exterior. […]

Source: Extreme Temperatures Breed Glassy Hollow Forms Called ‘Ghost Apples’