Led by Professor Dong Woog Lee in the School of Energy and Chemical Engineering at UNIST, the research team has drawn ...

The inner surface of the sculpture flips the world upside down, an optical effect that occurs when a concave reflection is viewed from beyond its focal point.

Both dials use the shape of a concave hemisphere, a shape like the inside of a bowl that mimics ... The hemispherium was carved out of a block of stone and its inner surface scored with eleven lines, ...