Scientists have built a real-life tractor beam that can pull actual objects using nothing but light. But it has one big drawback: it’s absolutely tiny. Despite its still tiny size, the new tractor ...

Laser powder bed fusion (LBPF), a 3D printing technique commonly used to make metal parts, creates large thermal gradients between areas hit by the laser and areas not being struck. This creates pools ...

Understanding how helical, curved beams operate — how their spiral cuts accommodate angular and parallel misalignment, axial motion, and system vibrations — is the key to knowing how they will perform ...