When a massive star collapses or two neutron stars collide billions of light-years away, the explosion can unleash a brief, ...

Gamma-ray bursts (GRBs) rank among the most powerful explosions in the universe, releasing immense energy in intense flashes of gamma rays. The most distant GRBs originate from the era when the first ...

Digital 3D scanners are revolutionary tools for measuring changes in orthodontics, periodontics, and tooth wear. While most studies focus on the accuracy of the 3D scanning process, obtaining the ...

Researchers have invented a new way to align 3D semiconductor chips by shining a laser through concentric metalenses patterned on the chips to produce a hologram. Their work can help to lower the cost ...

Scientists at the University of Massachusetts Amherst have introduced a novel method for aligning layers in chips using lasers and metalenses. The new technique is claimed to achieve accuracy down to ...

Three new articles present major advances in understanding the evolution of birds and mammals, made possible by new methods for comparing the genomes of hundreds of species. Researchers developed a ...

[Left] Semiconductor layers are stacked using concentric metalenses as alignment marks. [Right] Light shines through these marks to project a hologram. The alignment or misalignment of the lenses ...