13619053 - Pith ball13619056 - Pith ball and charged comb13619060 - Pith balls13619061 - Pith ball and charged balloon13619054 - Pith ball13619058 - Pith ball and charged balloon13619055 - Pith ball and charged comb13524095 - Rain droplets on a red car13619057 - Pith ball and charged balloon13619052 - Pith ball and charged comb12650357 - Fat-hen plants12492982 - Interaction between magnetic poles, illustration12492977 - Interaction between magnetic poles, illustration13619051 - Pith ball12639363 - Opposite and Like Magnetic Poles Attract and Repel12492972 - Interaction between magnetic poles, illustration12639362 - Like Magnetic Poles Repel12492969 - Interaction between magnetic poles, illustration12492973 - Interaction between magnetic poles, illustration12648804 - Magnetic Field of a Bar Magnet12492981 - Interaction between magnetic poles, illustration12492980 - Interaction between magnetic poles, illustration12492983 - Interaction between magnetic poles, illustration12492978 - Interaction between magnetic poles, illustration12492974 - Interaction between magnetic poles, illustration12492976 - Interaction between magnetic poles, illustration12650355 - Fat-hen plants12492979 - Interaction between magnetic poles, illustration12492975 - Interaction between magnetic poles, illustration12492984 - Interaction between magnetic poles, illustration12492971 - Interaction between magnetic poles, illustration12639359 - Magnetic Field12629895 - Matching Magnetic Poles Repel12492970 - Interaction between magnetic poles, illustration11699082 - Pine tree pest control,USA12030246 - Electrostatic interaction (3 of 3)11632703 - Magnetism experiment,188912030245 - Electrostatic interaction (2 of 3)12030244 - Electrostatic interaction (1 of 3)11632705 - Magnetism experiment,188911642766 - Insect repellents11632700 - Magnetism experiment,188911552864 - DEET insect repellent molecule11632702 - Magnetism experiment,188912044067 - Magnetic Field Lines,illustration11632701 - Magnetism experiment,188911552860 - DEET insect repellent molecule11899605 - Water repellent surface11632704 - Magnetism experiment,188912018286 - Magnetic Interaction12018252 - Pith Balls11519265 - Magnetic repulsion12017052 - Magnetic Repulsion12018251 - Pith Balls12018246 - Pith Ball11825389 - Waterproof clothing12018285 - Magnetic Interaction11537051 - Lady's mantle leaf (Alchemilla mollis)12016962 - Magnet Demonstration12005502 - Pith Balls12018245 - Pith Ball12008939 - Swallowtail Butterfly Caterpillar12005503 - Pith Balls12018284 - Magnetic Interaction12011272 - Sacred Lotus Leaf,SEM12003024 - Pith Balls