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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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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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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Early whales moved from terrestrial to aquatic environments Early whales moved from terrestrial to aquatic environments
Structure of the Early Universe Structure of the Early Universe
The declining age of menarche over the past 150 years has been measured in many European countries, The declining age of menarche over the past 150 years has been measured in many European countries,
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay? How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
Tunicate larva (Ascidia), early metamorphosis. LM. Tunicate larva (Ascidia), early metamorphosis. LM.
Evidence of early bipedalism Evidence of early bipedalism
Video: Muscle cell structures - actin, myosin and titin filaments

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