[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 ...

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 ...

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 ...