“Bille” is the first-ever monostable tetrahedron, or a pyramid-like shape with four triangular faces that has one stable ...

Which are the best putters this season? The putter is arguably the most important club in the bag so here is our guide to the ...

Finally, a Si triangular pyramidal needle was fabricated by photolithography and anisotropic TMAH (25.0 wt.%, 70°C) wet etching. The height of the needle was 0.1 mm. It is clear that the vertex of the ...