Glass cells filled with liquid crystals respond to light to make the first time crystals visible to the naked eye, even if you’d still get a better view using magnification. Previous time crystals ...

The original version of this story appeared in Quanta Magazine. In 1950 the Italian physicist Enrico Fermi was discussing the possibility of intelligent alien life with his colleagues. If alien ...

Complexity theory is a branch of computer science that studies the resources required to solve computational problems, particularly focusing on the classification of problems based on their inherent ...