The whales, the greatest creatures in the ocean, were formerly animals living towards land that walked on four legs. About 50 million years ago, their ancestors covered the banks, evolving towards the marine giants that we know today.
One of the first cetaceans, Pakicetus, was a creature the size of a goat who lived along the banks of the lakes and rivers in present -day Pakistan.
Although he was not like a whale in nothing, Pakicetus showed remarkable adaptations to life in water, including the ability to hear underwater.
The descendants of Pakicetus continued to adapt, leading to the evolution of the ambulocetus, which lived between 50 and 48 million years.
Ambulocetus was well suited to life both on earth and in water. His big feet were more similar to freight than the longer legs of Pakicetus, and he used his tail for swimming.
Over time, the species has evolved more and 40 to 33 million years, the fully aquatic Dormé has emerged. Dorudon was a creature five meters long with fins and tiny posterior legs, which lived entirely in water and even gave birth under water.
In just 10 million years, cetaceans had been completely adapted to aquatic life, marking an extraordinary evolutionary transition. A group of these evolutionary creatures, known as whales in Valeen, has developed more flat skulls and filter systems in their mouths, such as those observed in blue whales and humpback whales.
Meanwhile, other whales, including dolphins, orcas and sperm, have kept their teeth.
This fascinating journey from land to sea presents one of the fastest evolutionary transitions in history.