Some creatures, such as sea urchins, can react to light even though they do not have eyes. Previous studies of sea urchins have shown that they have a large number of genes linked to the development of the retina, which is the light-sensitive tissue in the human eye. The research group behind the study showed that the sensory light structures seem to be located on the tip and base of the tube feet that are found all over the sea urchin's body and are used to move.
I find this topic very interesting because I never knew that sea urchins could react to light. They even have genes that are linked to the development of the human retina. This allows us humans and the sea urchins to sense light around us. Having sensory light structures all over the body sounds amazing. It is like a 360 degree view of the things around you.
A lot of interesting facts about animals have been discovered, however, there are many more interesting species to be found. I hope that researchers which discover more amazing facts about nature.
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