By Gabriel Ferrero Stars are bright because, deep inside their cores, nuclei of atoms of lighter chemical elements (mainly hydrogen, helium and carbon) fuse to form nuclei of heavier elements. Such fusion produces huge amounts of energy, high temperature and high pressure, that balance out the tremendous force of gravitational attraction. Then, for most of…

By Miguel Oliveira Panão Every physical phenomenon can teach us something which can change how we view the world. I invite you to wonder about droplets. Can we learn anything from small droplets impinging on a surface? Every droplet loses itself when it impacts on a surface. Whether the surface dry or has a pre-existing…

By Catherine Belzung In an ant society, thousands of individuals are living together, each with a very high specialization. For example, some workers are foraging, and others are defending the colony. Therefore, not every individual is searching for food: indeed, only a subgroup of workers feed the rest of the colony and these individuals are…