In the fourth part of this series on the Swiss wilderness, we find ourselves at Lake Maggiore in southern Ticino. Here, there are enormous catfish and bright green tree frogs.

This advertisement for Mercedes-Benz features Tennis player Roger Federer.

The Swiss wilderness boasts a variety of climate zones, flora, and fauna. There are raccoons, and at Lake Lugano, there are even some hoopoes.

What species can you encounter in the Swiss mountains in spring? How does the landscape change at different altitudes? Watch this clip to gain some wonderful insights into a unique natural paradise.

In this video, Giada discusses three classic mistakes beginners make when speaking German.

In addition to wolves, badgers, and eagles, there are now lynxes roaming Switzerland once again!

To understand the impact of climate change on Germany's weather, meteorologist Sven Plöger accompanies researchers to Greenland's dramatic landscapes.

In the second part of the video, Galileo reveals five secrets about airplanes and answers a few questions you may have asked yourself whenever you have taken a flight.

Lotta and Oskar were just five and three years old when their grandfather suffered a heart attack at the playground. There were no adults in sight, but the little ones managed to get help.

In old-growth forests, trees can grow, live, age, and die naturally, and thereby contribute to the ecosystem rather than being harvested in the prime of their lives. That's why the WWF has nature reserves in Germany where the old-growth forests of tomorrow can develop.

You check in, board, find your seat, and off you go! Everyone's familiar with the routine. But why do the crew always greet you as you board the plane? And what's the purpose of that tiny hole in the windows?

Carl Benz was a brilliant inventor and visionary in the automotive industry. His patent for his "gas-powered vehicle" is widely regarded as the birth certificate of the automobile.

Paula and Alina are hanging out together this evening and have decided to watch a movie. Now they just need to pick something they'll both enjoy.

Do you know about mini doughnuts? They are much smaller than regular doughnuts, but just as delicious. Alina shows us her recipe for doughnuts with chocolate and lemon icing.

In this video, pain specialist Roland Liebscher-Bracht demonstrates three effective exercises for lower back pain.