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  2. Tattoos: The science behind getting inked - AOL

    www.aol.com/news/2016-08-12-tattoos-the-science...

    The artist does this by dipping a needle in ink and turning on a rotary motor which quickly jabs ink into the dermis over and over. Modern tattoo machines pierce the skin at a frequency of 50 to ...

  3. Tattoo - Wikipedia

    en.wikipedia.org/wiki/Tattoo

    The American Academy of Dermatology distinguishes five types of tattoos: traumatic tattoos that result from injuries, such as asphalt from road injuries or pencil lead; amateur tattoos; professional tattoos, both via traditional methods and modern tattoo machines; cosmetic tattoos, also known as "permanent makeup"; and medical tattoos.

  4. Stretch marks - Wikipedia

    en.wikipedia.org/wiki/Stretch_marks

    The most common places are the abdomen (especially near the navel), breasts, upper arms, underarms, back, thighs (both inner and outer), hips, and buttocks. Over time, they tend to atrophy and lose pigmentation. The affected areas appear empty, and are soft to the touch. [5]

  5. Complete Guide To Finger Tattoos + 40 Designs You Don ... - AOL

    www.aol.com/lifestyle/complete-guide-finger...

    Over the past few years, finger tattoos have risen in popularity. Small and cute, they are the perfect way to subtly reflect your personality. ... #13 Time in the Sun. An elegant fine-line tattoo ...

  6. Otolith - Wikipedia

    en.wikipedia.org/wiki/Otolith

    An otolith (Ancient Greek: ὠτο-, ōto-ear + λῐ́θος, líthos, a stone), also called otoconium, statolith, or statoconium, is a calcium carbonate structure in the saccule or utricle of the inner ear, specifically in the vestibular system of vertebrates. The saccule and utricle, in turn, together make the otolith organs.

  7. Evolution of the cochlea - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_cochlea

    The ear itself contains different portions, including the outer ear, the middle ear, and the inner ear and all of these show evolutionary changes that are often unique to each lineage. It was the independent evolution of a tympanic middle ear in the Triassic period that produced strong selection pressures towards improved hearing organs in the ...

  8. Scarification in Africa - Wikipedia

    en.wikipedia.org/wiki/Scarification_in_Africa

    These tattoos were not usually applied all at once, and instead were added onto over time. The Yoruba believed that the outer appearance was a visual representation of the inner spirit. Yoruba tattoo masters, or "oniisonon"-- "one who creates art"—were held in high regard, as their skill and speed was considered to be unmatched. [32]

  9. 2018 in paleomammalogy - Wikipedia

    en.wikipedia.org/wiki/2018_in_paleomammalogy

    A study on the anatomy of the ear region in Glossotherium robustum and on the evolution of the inner ear anatomy in the xenarthrans is published by Boscaini et al. (2018). [72] A study on the internal morphology of the skull of Glossotherium robustum is published online by Boscaini et al. (2018). [73]