We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

The study, led by biologists at Harvard University, found that the slugs build sac-like structures known as kleptosomes out of their own cells in which the chloroplasts are stashed. The kleptosomes ...

Deep below the surface of the ocean, bacteria and critters that feed off nutrients spouting from hydrothermal vents met with ...

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Sea anemones may look alien, but scientists just found out they're hiding an ancient body 'blueprint' – one that most animals, including humans, still follow. The discovery could shake up the timeline ...