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1. Narwhals. Narwhals are known as the "unicorns of the sea" due to their long, spiral-like tusks, which are actually elongated teeth. These mysterious marine mammals inhabit Arctic waters and use ...
Nian – Predatory animal; Night hag (Worldwide) – Supernatural creature, commonly associated with the phenomenon of sleep paralysis. Nightmarchers – Warrior ghosts; Nikusui – Monster which appears as a young woman and sucks all of the flesh off of its victim's body; Nimerigar – Aggressive little people
List of mathematical constants (typically letters and compound symbols) Glossary of mathematical symbols; List of physical constants (typically letters and compound symbols) List of common physics notations (typically letters used as variable names in equations) Rod of Asclepius / Caduceus as a symbol of medicine
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[7] [22] In addition, a prominent visual discriminant between young and mature leaves is their red-green color channel, which is only discernible to trichromats. [23] This theory supports the evidence showing that trichromatic color vision originated in Africa, as figs and palms are scarce in this environment thus increasing the need for this ...
Cephalopods, as active marine predators, possess sensory organs specialized for use in aquatic conditions. [1] They have a camera-type eye which consists of an iris, a circular lens, vitreous cavity (eye gel), pigment cells, and photoreceptor cells that translate light from the light-sensitive retina into nerve signals which travel along the optic nerve to the brain. [2]
The inner disks come in a variety of colors including pink, blue, yellow, red and green. Googly eyes are used for a variety of arts and crafts projects including pipe cleaner animals, sock puppets, pranks, and other creations. Googly eyes may also be attached to inanimate objects in order to give the objects a "silly" or "cute" appearance.
Apposition eyes work by gathering a number of images, one from each eye, and combining them in the brain, with each eye typically contributing a single point of information. The typical apposition eye has a lens focusing light from one direction on the rhabdom, while light from other directions is absorbed by the dark wall of the ommatidium .