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Tardigrades (also known as water bears) are tiny, water-dwelling, eight-legged animals with clawed feet. They are usually no more...Read More >>Tardigrades (also known as water bears) are tiny, water-dwelling, eight-legged animals with clawed feet. They are usually no more than 0.5 mm long when fully grown. They can go without food or water for more than 10 years.Animals are living things that can move about and must eat food to survive. This food may be plants, other animals, or both. Some animals are bigger than houses, while others are tinier than a dot on your screen. Animals are divided into two groups: vertebrates (animals with backbones) and invertebrates (animals without backbones). Vertebrates include fish, amphibians, reptiles, birds and mammals. Insects, spiders, worms and molluscs are all invertebrates.



A humpback whale breaching (leaping out of the water). Humpbacks may measure up to 16 m long (50 ft). Each of its flippers is 4.6...Read More >>A humpback whale breaching (leaping out of the water). Humpbacks may measure up to 16 m long (50 ft). Each of its flippers is 4.6 m (15 ft) long.


Invertebrates living above and below ground. The circle shows some tiny soil creatures magnified in size so we can see them. The...Read More >>Invertebrates living above and below ground. The circle shows some tiny soil creatures magnified in size so we can see them. The illustration includes insects (e.g. beetles and butterflies), arachnids (spiders), molluscs (snails and slugs), worms, mites, millipedes and centipedes.

Invertebrates

Around two million species (kinds) of animal are known to us. Scientists say there may as many as 30 million species yet to be discovered.

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