In a glass case in Cairo, a 5,000-year-old stone disc carved from fragile schist looks less like a ritual object and more ...

The term "involute" refers to the shape of the teeth: the curves of the teeth are involutes of circles, which are curves that optimize gear performance. Figure 1.1.2: The three marked circles are key ...

Every winter, Chicago becomes the epicenter of the puppet theater world. Here are some titles ...