The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
A detailed look at the steps of the citric acid cycle
Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do
The structure of a lipotechoic acid
Cordilleran-Type Mountain Building
Stearic acid
Draw a complete stepwise mechanism for the oxidation of benzil from benzoin using nitric acid.