balsa wood

This is the lightest commercial wood in the world, used in everyday life, which many people will be surprised to know.

Born nearly 100 years ago, the transistor is considered by some scientists to be one of the most important inventions for mankind, on par with the telephone, light bulb or bicycle.

Researchers at Harvard University have developed a 3D printing technique to create a light but very rigid cell mix using epoxy resins.