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Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Saguaro National Park in Arizona, part of the Sonoran Desert Saguaro National Park in Arizona, part of the Sonoran Desert
African bush (savanna) elephant in Etosha National Park, Namibia. African bush (savanna) elephant in Etosha National Park, Namibia.
Wombat in Narawntapu National Park, Tasmania Wombat in Narawntapu National Park, Tasmania
Heading for the ocean on a beach at the Pu'uhonua o Honaunau National Historical Park Heading for the ocean on a beach at the Pu'uhonua o Honaunau National Historical Park
Pink-eared Duck - At Central Park Zoo, New York, USA Pink-eared Duck - At Central Park Zoo, New York, USA
Video: How eudicots (true dicots) differ from monocots Animation

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