Fish see in the dark thanks to extra layers of rod cells in their eyes

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Fish see in the dark thanks to extra layers of rod cells in their eyes
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Visual tests in nocturnal coral fish reveal how multiple layers of rod cells at the back of the eye enable faster vision in low-light conditions

In a study in rats, artificially stimulating the locus coeruleus in the animals' brainstem quickly improved their ability to respond to sound following a cochlear implantInadequate numbers of bees and other pollinators have a huge impact on human health due to lower production of fruit and vegetables, according to a

modelling studyGenetic parasites called retrotransposons become more active as we age, and an animal study suggests this may trigger immune responses that shorten our lifespansA comparison of 138 species finds that dragonflies perceive changes in their environment five times faster than humans and 400 times faster than starfish

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