As you know, 66 million years ago, a giant asteroid fell to Earth, destroying dinosaurs and many other species of animals and plants. At that time, huge sharks lived in the waters, the sizes of which far exceeded the current indicators, but they also remained only in history due to the lack of food.
In the Cretaceous era, on land, dangerous predators and massive herbivores dominated, in the water space, the dominant force was ferocious marine reptiles, such as kronosaurs, ichthyosaurs, plesiosaurs, as well as sharks, which even exceeded all in size.
While everything was quiet and calm, monster sharks felt like kings of the water, eating mollusks and other reptiles. But then the planet faced a serious problem – an asteroid that provoked a global catastrophe. A massive extinction of marine life followed, and the sharks simply lost their food.
Scientists have determined that as a result of the disaster killed about 34% of all species of underwater predators. Most of those who were able to survive the terrible events have not survived to our time in their original form, as they were forced under pressure from conditions to evolve into ordinary fish.
The asteroid impact fell on the territory of the Yucatan Peninsula (Central America), where in 1978 a giant crater was discovered, whose diameter is 180 kilometers. In the list of the largest craters discovered on Earth, he takes third place. It is assumed that the diameter of the cosmic body was a whopping 10 kilometers, and the impact energy is estimated at 100 teratons of TNT, which is two million times larger than the most powerful thermonuclear bomb in human history. As a result of the collision, 15 trillion ashes and soot were thrown into the atmosphere, so for several years the sun's rays could not break through the formed dense wall, it was eternal night. The temperature on the continents decreased by 28 degrees Celsius, in the waters – by 11.
. (tagsToTranslate) Asteroid Fall (t) Sharks (t) Cretaceous