Thousands of ice balls (eggs) of various sizes completely covered a beach in Finland due to a rare weather phenomenon. This is reported by the BBC.
Amateur photographer Risto Mattiola discovered “ice eggs” on Hailuoto island between Finland and Sweden. Experts believe they formed due to a rare combination of wind and waves that “rounded” pieces of ice.
The photographer said that “he was walking on the beach with his wife when it was sunny and 1 degree below zero, and the day itself was windy”. That was when they saw “egg”-shaped phenomena made of snow and ice along the beach at the waterline. According to him, the ice figures filled about 30 meters of the beach.
The smallest “eggs” were the size of a chicken egg, and the largest were the size of a football. Experts believe that cold and windy weather is needed for such “ice eggs” to form. The shapes form from pieces of a large ice floe that touch each other through waves and thus acquire spherical shapes.
The more seawater “freezes onto the eggs,” the larger they become. As a result, smooth balls are formed, which waves carry ashore. Similar phenomena occur periodically in various parts of the planet.

Three years ago, huge ice balls covered 18 km of beach near the Siberian village of Nida. However, back then their sizes ranged from a few centimeters to 1 meter in diameter.