Michael McGinnis, a toy inventor from Ottawa, shows off his Perplexus 3D marble maze game. The toy was recently named by Time magazine as one of the top '15 smartest toys for young geniuses.' (Kate ...
The freshwater sculpin species Cottus gulosus and Cottus perplexus present a challenge to biologists because of their overlapping sympatric distributions, morphological similarity, and historical ...
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