“Where does man come from” -article talked about Charles Darwin and evolutionary theory.  When animals get babies, they are all different. Then, when these babies grow to adulthood and have their own offspring, some of their properties inherited by their descendants.

Animal breeding means that you look for certain properties in animals, and pick those to reproduce. When you keep doing this over decades, all of that species share the same properties. Take always hens that lay largest eggs and little by little, all the eggs of all hens will be larger.

The dog has been bred from wolf. People have domesticated wolves as their pets and most well behaving ones made puppies together and this went on over and over again. This way the current dog breeds were born.

At first one might say that it has always been there. However, scientists have discovered that space is expanding all the time, like a balloon. Strangely it seems like all points in space move farther apart all the time. You can try drawing points on an empty balloon with a marker and then ask your dad to inflate it  carefully. You will notice that the points move away from each other when the ball grows bigger.

By calculating backwards it was thought that sometimes, some 14 billion years ago, all material in the universe was one hot and dense mass. Much hotter than the sun. Then came a huge explosion which threw stuff around and at the same moment space and time were created. Little by little material got colder and began to form elements, which formed molecules which, while colliding, began little by little to form clouds, which are then condensed into stars and planets over billions of years.