There are millions of different types of living things on Earth. In order to keep track of them all, scientists put living things into groups based on characteristics that they have that are the same.

Gathering vision data for hundreds of vertebrates and invertebrates, biologists have deepened scientists' understanding of animal vision, including the colors they see. The researchers determined that ...

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A researcher studying the last common link between invertebrate and vertebrate animals has found a key genetic change that separates the spineless from the backboned. A researcher studying the last ...

Many people are surprised to find that insects, jellyfish and sea urchins are animals. Animals are generally thought of as medium-sized four-legged creatures with two sets of eyes and ears — those ...

New research from the University of St Andrews has discovered a crucial piece in the puzzle of how all animals with a spine - including all mammals, fish, reptiles and amphibians - evolved. In a paper ...

Invertebrates are animals without a backbone or bony skeleton. They range in size from microscopic mites and almost invisible flies to giant squid with soccer-ball-size eyes. This is by far the ...