The most ancient creatures on earth are the spiders. That is the conclusion drawn by researchers who study the flora and fauna of our planet, starting with the birth of her life and to modern days.

The researchers argue that this type of arthropods appeared long before the dinosaurs and survived to the present day, with minimal mutations and changes in DNA. They have survived various disasters on Earth, mereoritnye bombing and even the time of very cold - so-called glacial periods. However, according to scientists, the body of spiders reached its perfection, as they practically do not evolve.

Say the researchers, spiders are very tenacious, and that they owe their digestive system. Thus, the majority of spiders are able to live without food for up to two - three years, they may not appear for years from their burrows to wait for better weather conditions.

Known that spiders are divided into two groups - in the way of eating. First with a well-developed jaws attach themselves to the victim and pull out of it contents. Second, with less developed jaws, injected into the cavity of their prey gastric juice and waiting when he ingested a victim inside, and then proceed to its absorption. Typically, spiders choose prey, which is less than their size.