"Nikola Telsa was not in this for the money. He wanted to give the world free energy. If we are to implement free energy in the tradition of Nikola Tesla, then we need to replicate not only his science but his humanity.
25 Simple activities for preschool aged curious engineers. Technology/Engineering Ask questions, make observations, and gather information about a situation people want to change that can be solved by developing or improving an object or tool.
Infographic: 60 Seconds - Things That Happen Every Sixty Seconds. I like the way data were compiled. Colors and backgrounds make sense, data and icons are clear. I am much less impressed with the data itself; lack of source list doesn't help.