A 3D-printed smile

A SET of straight and gleaming teeth makes for a beautiful smile. But how many people who have undergone a little dental maintenance know that they may have inside their mouths some of the first products of a new industrial revolution? Tens of millions of dental crowns, bridges and orthodontic braces have now been produced […]

Hypsersonic jet engines

After more than 30 years of research, a new sort of rocket engine starts to sizzle SOME good ideas take years of dogged perseverance to come to fruition. That has certainly been true of a hypersonic engine which Alan Bond, a British engineer, began developing in 1982. Its first incarnation was as part of a […]

NASA and 3D printing

AEROSPACE was one of the first industries to take up three-dimensional (3D) printing. This is because 3D printers are good at making things which are complex and lightweight. The machines work additively, building up layers of material only where it is needed. This allows multiple parts to be consolidated into a single item, rather than […]