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.
- Hillary Clinton made her debut with VP pick Tim Kaine, who dipped into Spanish and spoke on support for immigration reform and gun control.
- The gunman who killed at least 10 people at a Munich, Germany mall on Friday was an 18-year-old "obsessed" with mass shootings, police said.
- ISIS has claimed responsibility for a bombing that killed at least 80 people in Afghanistan Saturday.