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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.
Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
![A melanistic jaguar at the Henry Doorly Zoo. Melanism is the result of a dominant allele and remains](https://biology-forums.com/gallery/47/medium_27689_23_04_12_3_35_20.jpeg)
![The S-curve in the human vertebral column--a result of the evolution of bipedality--makes humans hig](https://biology-forums.com/gallery/47/medium_273688_23_02_15_7_45_09_20852677.jpeg)