There’s something undeniably mysterious about mirrors. They hang quietly on our walls, reflecting our faces and rooms, yet they have always been linked to far more than vanity. Across cultures and ...

Infinite mirrors are a fun party trick, but the physics behind this phenomenon explains why it may not be true. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

Imagine you are a doctor during a deadly epidemic. As your hospital becomes overwhelmed with infected patients, you receive a vaccine that can prevent healthy people from contracting the virus, but it ...