Una técnica tradicional practicada por los jóvenes pastores de la tribu Banna de Etiopía.
Caminan sobre zancos para vigilar su ganado entre la hierba alta, desplazarse por zonas pantanosas y protegerse de serpientes y depredadores como leones y leopardos.
Old cathode ray tube TVs were essentially miniature particle accelerators sitting in our living rooms.
It's fascinating to think that for decades we watched images created by an electron gun firing beams at a phosphor-coated screen, making pixels glow thousands of times per second.