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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.