15 facts about fleas
Fleas are one of the most hated insects by pet owners. Once they find their way onto a dog or a cat, they are very hard to remove. Reproducing at a ve ...
Leeches, being eurytopic animals, are common on almost every continent. Although they usually lead a parasitic or predatory life, they have been used by humans for centuries for medicinal purposes. In the past, they were used for bloodletting, today, kept in sterile cultures, they support various medical therapies.