Scorpions (order Scorpiones) are predatory arachnids with eight legs, a pair of grasping pincers (or Chelae) and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always ending with a stinger. The evolutionary history of scorpions goes back to the Silurian Period, approximately 430 million years ago.
Scorpions (order Scorpiones) are predatory arachnids with eight legs, a pair of grasping pincers (or Chelae) and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always ending with a stinger. The evolutionary history of scorpions goes back to the Silurian Period, approximately 430 million years ago.
Source: Wikipedia "Scorpion" · CC BY-SA 4.0
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