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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.