The science of snow: How do flakes form, and why are they all unique?
Due to cooler atmospheric temperatures, Bodnar said that almost all precipitation starts as snow, requiring small pieces of ...
BBC1 年
Properties of 3D Shapes
When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a hexagonal prism. Image caption, The faces of a prism are ...