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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Body plan of a crustacean, as represented by a shrimp Body plan of a crustacean, as represented by a shrimp
Body plan of an echinoderm, as represented by a sea star. Body plan of an echinoderm, as represented by a sea star.
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
Basic principle of target-probe hybridization in microarray chips. Basic principle of target-probe hybridization in microarray chips.
The principle of Southern transfer and hybridization The principle of Southern transfer and hybridization
Gestalt Principle: Similarity Gestalt Principle: Similarity
Video: Evolutionary tree of life Animation

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