The formation of frost flowers can only happen when freezing weather conditions occur while the ground itself is not frozen. The sap from plants will expand, causing long, thin cracks to form along the length of the stem. Water is then drawn through these cracks and freezes upon contact with the air. As more water is drawn through the cracks it pushes the thin ice layers further from the stem, causing a thin “petal” to form.
- The U.S. will release Israeli spy Jonathan Pollard after 30 years. The move isn't tied to the Iran nuclear deal, American officials say.
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- The NFL has upheld Patriots quarterback Tom Brady's four-game suspension for his alleged involvement with the deflation of footballs 🏈