Search results for “vertebrates and invertebrates”

The Evolution of the Hand

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

What happened during the Cambrian explosion?

Around 500 million years ago, where the Atlantic is today, the Iapetus Ocean existed, a vast primordial sea dividing the continents of the time. In these waters, an evolutionary explosion unfolded. Authors: ZDF/Terra X/O. Gurr/L. Bockius/E. Jesse/KawomGbR/K22/M. Heß Translation and dubbing: alugha

Melatonin Release and the Body's Rhythm

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

Arthropods | Animal Fact Files

On this episode of Animal Fact Files discover the invertebrates who shed their exoskeleton as we introduce you to our arthropod playlist! You can learn more on: Twitter - https://twitter.com/animalfactfiles Facebook - https://facebook.com/animalfactfiles/ --- We always do what we can to be as acc