Spiral stairs are space savers ... The downside is that they need a center support structure that can be difficult to ...

like a spiral staircase. This structure, announced in their famous paper in the April 1953 issue of Nature, explained how the DNA molecule could replicate itself during cell division, enabling ...

This fancy, space-saving spiral staircase will adjoin two floors like the union of Houses York and Lancaster. Provides flexible access points and added management of your design.

"The disk, when viewed from a distance, would appear as a spiral structure with two twisted arms," the authors wrote. Those "arms" resemble the elongated structures of a spiral galaxy, like our ...