Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion. In the Ebbinghaus illusion, two identical circles placed side by side are each framed by a set ...
Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. For guppies (Poecilia reticulata) getting ready to mate, the color ...
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