tech Sony winding down production of recordable Blu-ray discs Rob Beschizza

vision How to easily identify your dominant eye David Pescovitz

geometry Why did this famous mathematician want a 17-sided shape on his tombstone? Ellsworth Toohey

Freaky giant humanoid photographed climbing Rocky Mountains Allan Rose Hill

gadgets Trifold phone announced by Huawei Rob Beschizza

Space Supermassive black holes only 300 light years apart Rob Beschizza

Science Scientists make temporarily transparent mice Jennifer Sandlin

art This interactive op art will spank your eyeballs and twist your synapses Allan Rose Hill

optical illusions Incredible sight as seven suns mysteriously appear over China (video) Allan Rose Hill

apple Apple's SuperDrive heads to gadget Valhalla Rob Beschizza

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Science Optical illusion causes whirling blades to appear almost stationary Popkin

tourism The weirdest free tourism spots in the U.S. B.R. O'Deal