optics Pentagon: UFO vids show trash, drones Rob Beschizza

optics Trick your brain with this spinning dots optical illusion Popkin

lenses 3D print a 164mm f/2.5 lens Rob Beschizza

metamaterials This incredibly tiny camera is the size of a grain of salt David Pescovitz

strijdom van der merwe This "Staircase to Heaven" is actually just a beautiful illusion Carla Sinclair

playing with your food Learn About "Fork-and-Knife Illusion" From A New Scientific Paper Written By A Middle-schooler Thom Dunn

contact lenses Man invents robotic device to insert contact lenses David Pescovitz

fiberoptics Lovely demonstration of the optic part of fiberoptic cable Andrea James

invisibility The guy standing behind this invisibility shield made a few improvements Andrea James

optics This scientific paper about black holes includes a 1:1 image of a black hole John Struan

optics Adapting a 100-year-old lens to shoot video on a new camera Rob Beschizza

optical How to easily identify your dominant eye David Pescovitz

lenses How to make your own camera lens from sand and rocks David Pescovitz

mask Bronze masks coated in Vantablack produce trippy illusions Andrea James

enhance Watch how machine learning can enhance low-light images Andrea James

Burn baby burn Watch the world's brightest flashlight burn stuff Andrea James

light pillars Weather phenomenon of light pillars vs. northern lights Andrea James