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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

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Thyroid conditions may make getting pregnant impossible.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

The Blue-bearded Bee-eater Nyctyornis athertoni is a large species of bee-eater found in South Asia. The Blue-bearded Bee-eater Nyctyornis athertoni is a large species of bee-eater found in South Asia.
Past Human Past Human
In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han
The supralaryngeal airway in a chimpanzee and a human. The supralaryngeal airway in a chimpanzee and a human.
Cross-section view of the human eye. Cross-section view of the human eye.
Comparison between human chromosome 21 and chimpanzee chromosome 22 Comparison between human chromosome 21 and chimpanzee chromosome 22
Video: Gas exchange - driving force

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