Carolyn Trietsch recently defended her Ph.D. in entomology at Penn State. You can view her website or follow her on Twitter @carolyntrietsch. Laser pointers are perhaps the most abused visual aids in ...
new video loaded: Laser Pointers and Traffic Cones: Creative Ways Hong Kong Protesters Are Organizing transcript Traffic cones, suitcases and laser pointers: These are just some of the objects that ...
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