It was previously believed that our pupil size was only affected by three things: light, focusing on nearby objects and ...

In our today's optical illusion, a tricky challenge awaits—finding the hidden 78 among a sea of 70s. This brain teaser tests your observation skills and pattern recognition. Can you spot it in under ...

This optical illusion can reveal whether you're a creative genius or a logical thinker based on what you spot first in the ...

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