Psychology & Psychiatry

Creativity starts in the cradle, new research shows

Infants less than 1 year old can combine simple concepts into complex ideas, showing that creativity begins in babyhood. According to new research at the University of Birmingham, in the U.K., and Central European University ...

Diseases, Conditions, Syndromes

A potential game-changer for emergency medicine: Synthetic platelets

Imagine being a paramedic treating a trauma patient who's bleeding severely. You know your patient's life is in danger, but there's not much you can do because the patient needs an infusion of blood containing platelets. ...

Diseases, Conditions, Syndromes

Q&A: How the H5N1 bird flu outbreak could become humanity's problem

Four years ago, as attention locked onto COVID-19, another virus began circling the globe. A major outbreak of a new strain of bird flu—formally named influenza A virus subtype H5N1—has since killed millions of wild birds ...

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Eye

Eyes are organs that detect light, and send signals along the optic nerve to the visual and other areas of the brain[citation needed]. Complex optical systems with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in cnidaria, molluscs, chordates, annelids and arthropods.

The simplest "eyes", such as those in unicellular organisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment.

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