perception Check out this stunningly strange double optical illusion David Pescovitz

cognition These are the best optical illusions of 2021 David Pescovitz

perception This is not a color photo but rather an astonishing optical illusion David Pescovitz

directors Horror movie directors use these fascinating tricks to scare the hell out of you David Pescovitz

Reality Hacking More on the Ames window illusion Gareth Branwyn

perception Are you a super-recognizer? Take this test Mark Frauenfelder

psychonauts Watch World Science Festival's psychedelics panel Andrea James

perception Which face is real? Rob Beschizza

hands Freak out on this fantastic hand illusion David Pescovitz

computer vision Watch this drone dodge soccer balls hurled at it David Pescovitz

sensory Enjoy this strange new audiovisual illusion from Caltech scientists David Pescovitz

gestalt Watch how to make a pixellated avatar using an actual photo Andrea James

audio illusions Neat audio illusion explained using that annoying Smashmouth song David Pescovitz

perception Your perception of this graph is a graph of your perception David Pescovitz

musicology What is the slowest music humanly possible? Andrea James

sense Beyond the big five, humans have dozens of senses Andrea James

perception Watch MC Escher make art in this short documentary David Pescovitz

senses You can hear the difference between hot and cold water David Pescovitz

dissociation Get high for free: stare in a friend's eyes for ten minutes Andrea James

deepdream WATCH: More DeepDream obsessions Andrea James