Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade
Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Acanthodians are often referred to as "spiny sharks"; though they are n
The dhole (also known as the Asiatic Wild Dog, Indian Wild Dog and the Red Dog) is an endangered wild dog native to the jungles of Asia. Although the dhole is very similar in appearance to the African Wild dog and the Bush dog, the dhole is the only member of it's genus.
Historically, the dhole was found though East and Southern Asia, from the Russian far east right down to Sumatra, and although today the range of the dhole has been significantly reduced, the dhole inhabits a wide variety of habitats including thick, deciduous woodlands to jungles and tropical rainforests.
There are three different species of dhole that are very similar in characteristics and only really differ i
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African elephants are the largest land animals on Earth. They are slightly larger than their Asian cousins and can be identified by their larger ears that look somewhat like the continent of Africa. (Asian elephants have smaller, rounded ears.)
