Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft). They have complex ecologies and interactions with each other and their environments, forming intricate food webs.

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May 18, 2026 · animal, (kingdom Animalia), any of a group of multicellular eukaryotic organisms (i.e., as distinct from bacteria, their deoxyribonucleic acid, or DNA, is contained in a membrane-bound nucleus).

Apr 28, 2026 · As you explore this A–Z animal names list, you’ll notice how each species plays an important role in nature. Keep learning, stay curious, and you’ll soon recognize animals by their …

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Over 1.5 million living animal species have been described —of which around 1 million are insects —but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a …