A few nasty viruses have managed to gain entry into the cells. But the white blood cells can handle them!

In this final segment detailing the goings-on within a human cell, we learn about what happens when there’s a skin injury.

A circus tent full of sustainability experts: This image was presented today to journalists in Frankfurt-Ginnheim, as 300 fourth graders from Frankfurt primary schools celebrated the graduation ceremony of the first Frankfurt "School Year of Sustainability" in the children's Zarakali Circus.

This entry in the “explainity” short video series lays out the concept of sustainability and its three pillars: environmental, social, and economic.

Two businessmen shake hands, have a meeting, and both fall ill the next day. What did they do wrong? According to this report, they should have kissed each other on the cheek instead of shaking hands! A doctor in Berlin also tells us about the effectiveness of herbal teas... Gesundheit! (video copyright dpa)

The wheel may not need reinventing, but a Japanese designer has made a very good argument for the umbrella. Not only is it designed not to get ruined in a strong wind, but it has a few other neat features too! (video copyright dpa)

"There are inventions that were made and later forgotten, and there are inventions that somebody forgot to invent." Walter Günther from Frankfurt/Main has done some catching up. He makes devices, which look as if they are from a museum, but which in reality never existed! (Copyright DPA)

The great inventors' exhibition begins soon at the Nuremberg Exhibition Hall, where more than 700 inventions are on display. Check out just a few of the many clever ideas being presented. (video copyright dpa)

Everyone knows the brand Mercedes-Benz, but not many know much about the founder. This video series tells the story of the automobile from the very beginning, and in particular, the life story of Carl Benz.

When Carl Benz first introduced his invention, people were anything but enthusiastic. In fact, many were terrified of the strange, spluttering contraption.

At more than 500 meters, Ulrichstein is the town in the state of Hessen with the highest elevation and, thus, an ideal location for harnessing the wind. Satisfying Germany's demand for energy in the new energy economy is the subject of this informative clip from the highland region of Vogelsberg. Copyright: Deutsche Presse Agentur [The German Press Agency]

The search for the true love: More and more singles are trying out online dating agencies and according to them, with success. Copyright: Deutsche Presse Agentur [The German Press Agency]

Emilio is an actor in the "Bibi & Tina" films and also a musician and singer. His song “Ausmacht” is about asking his partner’s permission to fall in love.

Emilio dedicates this heartfelt, celebratory song to his mother, who emigrated from Morocco to Germany all alone when she was young. She sought freedom, and the chance to give her future children a better life.

"Raus" is the end credits song for the documentary "SCHWEINSTEIGER Memories — From Beginning to Legend," which was produced by Til Schweiger. The song is about Bastian Schweinsteiger, an ambitious soccer player whose priorities are shifting.