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Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

The small dorsal fin of this blue whale is just visible on the far left. The small dorsal fin of this blue whale is just visible on the far left.
The common squirrel monkey (Saimiri sciureus) is a small New World primate from the Cebidae (squirre The common squirrel monkey (Saimiri sciureus) is a small New World primate from the Cebidae (squirre
Small and large intestines Small and large intestines
Various Substances Used in Piaget’s Conservation Task Various Substances Used in Piaget’s Conservation Task
Small intestine, micro organisms Small intestine, micro organisms
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Video: Smoking Cessation

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