When a bird lands on a branch, it bends its legs, tightening the tendons and curling its toes around the branch. The deeper it squats, the tighter its grip becomes. Authors: ZDF/3sat/nano/Autorenkombinat/Holger Barthel und Daniel Beißmann/Markus Wohn/Maximilian Heß Translation and dubbing: alugha
New York City is divided into five boroughs and sits at a river mouth. This has historically been beneficial for shipping, trade, and immigration. However, the rising sea level poses a threat to the city. Authors: ZDF/Terra X/Bilderfest/Florian Breier/ Holger Neuhäuser/ Katharina Weiss/M. Heß Tran
Mold is a microorganism that forms a typical fungal network. It mainly reproduces through spores. The slightest breeze carries these spores everywhere, which is how they end up in our homes. Here, they usually find ideal conditions. Authors: ZDF/3sat/nano/Autorenkombinat/Josephine Blume, Holger Bar
An analog compass responds to the Earth's magnetic field. A digital smartphone compass, however, works without a magnetic needle. The job of the magnetic needle is taken over by a sensor made of three layers. Authors: ZDF/3sat/nano/Autorenkombinat/Josephine Blume, Holger Barthel, Ingo Schwarz /Alex
Paleontologists estimate that around 380 million years ago, there were fish with pectoral fins that already had finger-like bones. And from those, the limbs of vertebrates evolved. The skeleton of these limbs follows the same basic blueprint: Authors: ZDF/3sat/Marco Polo Film AG/Herbert Ostwald/Hol
Our power grid has four different voltage levels. The higher the voltage, the lower the energy loss during distribution. From the maximum voltage of 380 kilovolts (kV) to the low voltage of 230 volts for the end consumer in private homes. Author: ZDF/3sat/nano/Marco Polo Film AG/Dietmar Klumpp/Holg
The Roman Empire defines its borders. Hadrian's Wall in Britain and the approximately 550-kilometer-long Limes in Germania are imposing security systems against unwanted immigrants and hostile attacks. Author: ZDF/Terra X/ Story House Productions/ Sigrun Laste/ Jürgen Rehberg, André Götzmann/ Oliv
About 50 billion migratory birds are on the move in spring and autumn to reach their breeding or wintering grounds. Along the East Atlantic bird migration, the food-rich Wadden Sea in the North Sea plays a crucial role. Author: 3sat/NANO/Logo (Marco Polo Film AG)/S. van Iersel, T. Visser, A. Scheur
