You are holding an unusual edition. Why is it amazing? With its help, you can get acquainted with animals that disappeared from the face of our planet millions or thousands of years ago. Ancient beasts left evidence of their existence in the form of preserved parts of the skeleton, fossilized footprints, skin prints or feathers. Often paleontologists have to collect information literally bit by bit: even finding one bone or part of the skull, they try to recreate the appearance of the animal and imagine its lifestyle. In this, scientists are helped by a comparison of representatives of ancient and modern fauna. Of course, in such cases, the conclusions of the researchers are only hypothetical, but no less curious.