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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
There are more sensory neurons in the tongue than in any other part of the body.