Discover how to build a simple electromagnetic motor and generator using everyday materials in this hands-on science ...

No extant maker's markings. Two circular field coils, 5" in diameter, are affixed to a wooden base with two metal straps. The field coils stand vertically with a coil armature rotating between them on ...

The molecular motor that folds and packs DNA into a virus is at its most efficient when the DNA shows some self-repulsion. That is the surprising finding of researchers based in the US – it was ...