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Top Ten Super Ancient Creatures on Earth
The top ten super ancient creatures on earth are: giant shrimp, giant horseshoe crab, giant dragonfly, giant snail, giant sea scorpion, land killer scorpion, corner stone, giant centipede, giant clam and ancient centipede worm.

1 giant shrimp

Giant shrimp is a very strange ancient creature, which has the characteristics of squid and shrimp. Its body length reaches 1 m, and its mouth is covered with sharp teeth. The strange shrimp fossil was found in China, and it is an ancient underwater arthropod that lived about 500 million years ago. It probably feeds on small crustaceans and swallows them with sharp teeth. Its teeth are like serrated knives, and its powerful jaws can capture larger prey.

2 giant horseshoe crab

This is the largest trilobite species found so far, with a body length of 60 cm. They lived in the Paleozoic era about 500 million years ago and swallowed rotting biological corpses at the bottom of the sea. It is very similar to horseshoe crab, with a thick armor shell and compound eyes, and its body is segmented. Giant horseshoe crab and other trilobite species are relatively simple and adaptable creatures, which have survived for 300 million years.

3 giant dragonfly

Modern dragonflies are small in size, but their ancestors were very large. In ancient times, giant dragonflies had a wingspan of 60 cm and a body length of nearly 40 cm. This huge body led researchers to guess that it might feed on animals the size of frogs and squirrels. The reason for the extinction of this huge prehistoric dragonfly is that the oxygen content of the earth's atmosphere began to rise millions of years ago.

4 giant snails

The largest snail species today is the African giant land snail, with a body length of 18 cm and a shell diameter of 9 cm. However, their prehistoric giant snail is considered to be the largest snail in the history of the earth, with a body length of nearly 60 cm. Paleontologists believe that they lived in the Eocene ocean 50 million years ago.

5 giant sea scorpion

The giant sea scorpion fossil was first discovered in Germany in 2007, and its body length reached 2.4 meters. In fact, the length of only one pincer exceeded 46 centimeters. This species disappeared in the Permian period 250 million years ago.

6 land killer scorpion

Land killer scorpion is another ancient scorpion species. They live on land and can reach 60 cm in length. They lived in the Devonian period about 400 million years ago. It is likely that they feed on small arthropods and insects, and their bites are enough to kill some animals.

7 fangjiaoshi

Judging from the fossil remains of Fangjiaoshi, its body length can reach 9 meters. It may be the largest marine predatory species in Paleontology. They searched for food in seawater and ambushed their prey. According to the analysis of paleontologists, it is basically a blind creature, like a modern close relative species, Nautilus, which is an ocean floater.

8 giant centipede

The giant centipede is very similar to the modern centipede in appearance and behavior, but the difference is that its body length exceeds 1 meter. Archaeologists have found this ancient giant centipede fossil in Europe and North America, and scientists are not sure about their food. In contrast, modern centipedes are only 25 cm long and can prey on birds, snakes and bats.

9 giant clam

Giant clams are one of the largest bivalves found so far in the history of the earth, with a body length of 3 meters. In contrast, their volume is 2.5 times that of modern large clams.

10 ancient centipede

The ancient centipede is the ancestor species of centipedes and millipedes, and its body length can exceed 2.4 meters. It is a fat ancient creature and one of the few invertebrate predatory creatures found so far. They lived from Carboniferous to early Permian, and lived in present-day North America and Scotland about 300 million years ago.