Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing invertebrates such as nematodes, arthropods, and molluscs, and the deuterostomes, containing the echinoderms and the chordates, the latter including the vertebrates. Life forms interpreted as early animals were present in the Ediacaran biota of the late Precambrian. Many modern animal phyla became clearly established in the fossil record as marine species during the Cambrian explosion, which began around 542 million years ago. 6,331 groups of genes common to all living animals have been identified; these may have arisen from a single common ancestor that lived 650 million years ago.
Humans make use of many animal species, such as for food (including meat, milk, and eggs), for materials (such as leather and wool), as pets, and as working animals including for transport. Dogs have been used in hunting, as have birds of prey, while many terrestrial and aquatic animals were hunted for sports. Nonhuman animals have appeared in art from the earliest times and are featured in mythology and religion.
one of the smallest birds in the world
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some ways we can help endangered animals
Reduce And Reuse
Reuse items in your household when you can, and buy products that produce less packaging waste. By purchasing second-hand furniture, clothes, electronics, and toys, you help reduce the energy consumption required to make new ones and produce less waste as well. Choose reusable bottles for beverages whenever you can. Use a reusable bag for your groceries, and carry your own container to the restaurant for the leftovers.
Don’t Use Harsh Chemicals In Your Household
Toxic chemicals used in laundry, housecleaning, dish washing and personal care products end up in underground waters, poisoning aquatic life and any animals that feed on them. Choose non-toxic products, or make your own.
Dispose Of Waste Properly
Recycle plastics, paper, metal cans and glass. When you take out your trash, see that the bag is sealed safely so you don’t litter by accident. Dangerous compounds such as car fluids, paint, bleach, batteries, pesticides, and other chemical substances should be disposed of properly at a specialized facility.
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