The term polycatenated architected materials refers to the way they are built: not from solid blocks or rigid lattices ... impact-resistant materials, and shape-morphing structures.

A 3D shape with regular polygonal faces, meeting at equal angles, is a platonic solid. There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron. A prism is a ...

"Overall, the economy is in solid shape. We intend to use our tools to keep it there," Powell said. The Fed Chairman said ...

Scientists have uncovered new information about the Earth's core: it may not be completely solid. Instead, its center may be more malleable than expected and has changed shape in recent years.

The study, recently published in Science, describes micro-robotic units that can switch from a "fluidizing" state to a more "solid" shape based on the rotational state of the robots. The idea is ...