Except here mathematicians have been thinking not about the packing of people, but of geometric solids known as tetrahedrons. “It’s pretty remarkable how many papers have been written on this ...

Chemists have discovered that pointy gold tetrahedrons self-assemble into 2D chiral superlattices. The structures could be useful metamaterials. Tetrahedron-shaped nanoparticles are interesting ...

Re “Packing Tetrahedrons, and Closing In on a Perfect Fit” (Jan. 5): The efficient packing of tetrahedrons was put to a test on a large scale 60 years ago during the construction of McNary Dam ...

While doing a routine check on a batch of tiny gold tetrahedrons, Rice chemist Matthew Jones and graduate student Zhihua Cheng found their microscopic particles had the unanticipated ability to ...

As they showed in a recent paper in Physical Review Letters, the tetrahedrons created by this exercise could then be analysed for evidence of parity violation. Now, they report the result of such a ...

The Authagraph World Map: once the tetrahedrons are laid out, you can choose any way you like to cut a map out. It's not officially yet an equal-area map in the eyes of the cartography community ...