(Photo: Spirit of America, Shutterstock). The Fourth of July celebrates the day in 1776 when colonial American representatives ratified the Declaration of Independence, making official their intention to break away from England and organize a sovereign government.
The Most Deadly Animals: Mosquitoes. The most deadly Â­animal in the world is the mosquito. It might seem impossible that something so miniscule can kill so many people, but it's true. Mosquito bites result in the deaths of more than 1 million people every year [source: WHO ].
Animals with backbones, like these zebras, are commonly referred to as vertebrates. Mammals, birds, fish, amphibians, and reptiles are all vertebrates. Zebras belong to the mammal order. Mammals, which also include humans, are the most complex animals in the animal kingdom.Fossils indicate that animals have existed on Earth for over 1.2 billion years, but our knowledge of past life is still incomplete.nimals belong to the largest and most diverse of the five kingdoms of living things. So far over two million animal species have been identified. All animals share certain features. Unlike plants, animals get the energy they need by eating food. They are all made up of many cells and many animals are highly mobile.