Lasers normally emit only one color, or frequency of light. This is true for laser pointers or the laser diodes in a DVD player. [Kevin] caught wind of state-of-the-art research into making variable ...

An Australian mum has issued a concerning warning about a new Kmart toy that has parts a young child could choke on. The Brisbane mum bought the $3.50 foam gliders before realising they have small ...

If the utility of an invention were somehow derived from the genius of its inventor, it would be pardonable that so many sources trace the idea for the ball bearing to a 1497 drawing by Leonardo da ...