Tobi revisits an old childhood riddle: Who leaves the deepest traces in the earth? His search takes him to places like Madagascar, Spitsbergen, and Mexico, where he uncovers what connects them and ...

When we are born, our first meal is milk. This is not only the case for us humans, but for all mammals. Tobi explores what exactly is in milk and how does the milk get to the supermarket. South of ...