The solution to removing streaks from mirrors was in our kitchen all along: coffee filters. This is how to use coffee filters to clean streaky mirrors.

Coffee filters make surprisingly great cleaning tools for mirrors, glass, and screens because they’re lint-free, non-abrasive ...

Controlling light is an important technological challenge—not just at the large scale of optics in microscopes and telescopes ...

Tessellations aren’t just eye-catching patterns—they can be used to crack complex mathematical problems. By repeatedly ...