There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Thyroid conditions may make getting pregnant impossible.
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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Tactile communication among honeybees regarding food sources.
A simplified food web from an African savannah ecosystem
This jumping spider's main ocelli (center pair) are very acute.