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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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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.

General structure of a plant cell General structure of a plant cell
Structure of a DNA polymerase polypeptide that contains a 3'–5' proofread Structure of a DNA polymerase polypeptide that contains a 3'–5' proofread
Structure of chlorophyll molecules in chloroplasts of plants Structure of chlorophyll molecules in chloroplasts of plants
Wild chimpanzees make and use simple tools to obtain food, learning tool making from one another. Wild chimpanzees make and use simple tools to obtain food, learning tool making from one another.
Guide to Major Massage Therapy Organizations in the United States* Guide to Major Massage Therapy Organizations in the United States*
Structure of the thiamine pyrophosphate riboswitch from the plant Arabidopsis thaliana Structure of the thiamine pyrophosphate riboswitch from the plant Arabidopsis thaliana
Video: How to find out if a population is evolving?

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