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Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

The flukes of a sperm whale as it dives into the Gulf of Mexico The flukes of a sperm whale as it dives into the Gulf of Mexico
Sperm whale arching back in preparation to dive off Dominica Sperm whale arching back in preparation to dive off Dominica
sperm trying to fertilise an egg. sperm trying to fertilise an egg.
Sperm penetrating egg cell Sperm penetrating egg cell
Intracytoplasmic sperm injection (ICSI). Intracytoplasmic sperm injection (ICSI).
The thymus, a primary lymphoid organ where T cells mature. The thymus, a primary lymphoid organ where T cells mature.
Video: Brain Anatomy Animation (Part 1 of 2)

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