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
Migratory birds can find their destinations over vast distances. They use the Earth's magnetic field as a compass, navigating by the stars at night. But recently, artificial lights have been disrupting the animals' nighttime navigation. Authors: 3sat/NANO/Logo (Marco Polo Film AG)/S. van Iersel, T.
The pineal gland regulates the body’s day-night rhythm through melatonin release. So when it gets dark and hardly any light reaches the eyes, it releases melatonin. Higher melatonin levels make us tired. Authors: 3sat/NANO/Logo (Marco Polo Film AG)/S. van Iersel, T. Visser, A. Scheurich/ Armin Rieg
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
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