In Norse mythology, there is a story in which Thor and Hymir (husband of the giantess Hrodr and father of the war god Tyr) sail the seas in search of the giant serpent Jormungandr, a giant serpent so large that its body could encircle the entire earth.

They killed their prey by wrapping it around them and then twisting it tightly like modern anacondas, only they and their prey were many times larger than today’s giant South American grazers.
The story about the above snake is really incredible, but in fact, scientists believe that about 60 million years ago, in vast tropical swamps, there existed a giant python the size of. They are many times larger than today’s Anaconda pythons.
This is Titanoboa, the largest python known to man. By comparing the size and shape of its fossilized spines with those of modern snakes and pythons, researchers estimate that its adult bodies were more than 15 meters long and weighed about 1.1 tons, twice that of a modern adult anaconda.

Scientists believe this giant python sits at the top of the food chain in the swamp forests of Colombia. Favorable food sources, in addition to warm temperature conditions and swampy environments, may be important factors that make it so massive in size.
Scientists still cannot explain the reason why this species of python is so big, but there is much speculation that during the Paleocene, Colombia was a warm tropical area with squids. The average temperature is 32 degrees Celsius.
The warm climate of the Earth at that time allowed pythons and cold-blooded snakes to grow larger than their modern relatives.

With this size, the giant python Titanoboa can easily swallow not one but several adults, but fortunately for humanity, today they are completely extinct, the only thing left are just fossils.
To compare the “terrorism” of this species, we can see that the largest pythons and snakes that exist today are the reticulated python (Python reticulatus) with a length of about 9 m and the green anaconda (Python reticulatus) with a length of about 9 m and the green anaconda (Eunectes murinus) with a length of about 7.5 m.
To date, humanity has only discovered 28 different fossil specimens of this species in the Cerrejón coal mines in northern Colombia.
A handful of other Paleocene fossils related to the modern South American anaconda have also been found in ancient tropical environments in South America.

Looking at the simulation image, it seems that this python is hunting a T-Rex dinosaur, but in fact it is not, this dinosaur is called Majungasaurus. Like the T-Rex, it lived in the late Cretaceous and was also a carnivorous dinosaur.
This giant python lived at the same time as dinosaurs like Majungasaurus, Masiakasaurus, and Rahonavis. With such a size, Titanoboa could have been ready to eat dinosaurs to satisfy its hunger.
As for why the giant python Titanoboa became extinct, many people believe that there were times when the earth’s temperature dropped, making it very difficult for the cold-blooded animal to adapt to low-temperature environments.
In addition, to find an ideal environment, they must migrate to new environments with suitable temperatures. Food sources may also be reduced, causing the number of this species to decrease and become extinct to make room for smaller species.

Majungasaurus is a genus of abelisaurid theropod dinosaur that lived over 60 million years ago. The genus contains a single species, Majungasaurus crenatissimus.
In addition to them, there once existed on Earth a giant African python (Gigantophis), which can measure up to 10.7 m in length, lived in the desert south of the Sahara 40 million years ago and could today eat its ancestors, the elephants.