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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Formation of additional eyes in Drosophila caused by the abnormal expression of a master control gen Formation of additional eyes in Drosophila caused by the abnormal expression of a master control gen
The biped’s foot bears more weight than the quadruped’s and so the bones are stouter. The biped’s foot bears more weight than the quadruped’s and so the bones are stouter.
Fossils of hand and foot bones of Homo naledi Fossils of hand and foot bones of Homo naledi
Intrinsic muscles of the foot. Intrinsic muscles of the foot.
Mount Pinatubo caused ~1˚C cooling for up to 5 years Mount Pinatubo caused ~1˚C cooling for up to 5 years
Botulism A rare but serious paralytic illness caused by the bacterium Clostridium botulinum Botulism A rare but serious paralytic illness caused by the bacterium Clostridium botulinum
Video: Factors that increase metabolic rate and heat production

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