School is back in session in North Rhine-Westphalia, Germany’s most populated state. To protect against coronavirus infections, masks are mandatory in school buildings and classrooms. How are the students and teachers dealing with the new requirements? Copyright: Deutsche Presse Agentur [The German Press Agency]

In this German PSA, Javelin throw world champions Johannes Vetter and Christina Obergföll recall the Corona winter of 2020. They longed to be training outdoors while the government was ordering everyone to stay home. After some lazy months of lockdown, they eventually found a way to keep fit.

The 18-kilometer Fehmarn Belt Tunnel connecting Denmark and Germany will be the longest immersed tunnel in the world. This video explains how 360,000 tons of steel and 3 million cubic meters of concrete are being used to create the tunnel, which will run between Rødbyhavn on the island of Lolland and Puttgarden on the eastern coast of Schleswig-Holstein.

In this video, you can see the impressive peaks of the Austrian Alps, along with some of the animals that inhabit them in difficult conditions.

People living in the Alps are also anxiously awaiting spring. The Imster Schemenlauf is a traditional parade to drive out the winter.

As the snow melts in many areas of the mountains, plants and animals alike emerge in the fresh spring air.

In this segment, we follow a badger and a fox family through the beautiful sunlit forests of the alps.

In the spring, birds have to work hard to feed their hungry offspring and keep them safe in beautiful, yet harsh environments.

As spring struggles to break through, blooming flowers may be preserved in ice. Meanwhile, the male grouse tries to attract potential mates.

The segment features more footage of the alpine black grouse, as well as a festival held by the local religious community in the valley of Kals.

This episode comes with spectacular views on Austrian lakes and introduces the daffodil festival in Grundlsee.

Life in the alpine pastures of Tyrol has its own pace in tune with natural cycles. We visit an alpine farmer and his wife and learn about traditional dairy products and how they are made.

In this segment, we see how the churned butter is put into a traditional wooden mold, take a look at some more farm animals, and catch a glimpse of the "Daberklamm," an alpine gorge.

In this segment, we get to know the bearded vulture, a scavenging bird of prey that has resettled in the Hohe Tauern National Park. Now there are even stations in the park that address some of the misconceptions that almost led to this bird's extinction.

Up in the mountains, a vulture and an eagle fight for their territory while conservationists watch closely. The series ends with a view of the Venediger Group, a famous high mountain range.