Phys.org - latest science and technology news storiesHow a soft coral moves its tentacles in perfect synchronization without a brain
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ScienceAlertEven a boneless, gelatinous sack lacking a dedicated anus and brain needs its beauty sleep, a new study by researchers from Bar-Ilan University in Israel finds.
Starfish (aka sea stars) are master climbers.
Phys.org - latest science and technology news storiesSleep is essential for much of the animal kingdom. During the night, neuron and tissue repair mechanisms are activated to aid recovery from daily activity. This is risky: organisms that sleep are more vulnerable to predators. However, the phenomenon extends from mammals to invertebrates. Nevertheless, until now it was not known whether other, more ancient groups without neurons, such as corals, engage in any kind of nocturnal rest.