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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Genome sizes among selected groups of eukaryotes Genome sizes among selected groups of eukaryotes
A plot of trophic diversity across the major groups of organisms shows highest trophic diversity amo A plot of trophic diversity across the major groups of organisms shows highest trophic diversity amo
Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to
Symbolic language may have helped reinforce exclusive sexual relationships within social groups in l Symbolic language may have helped reinforce exclusive sexual relationships within social groups in l
The proportion of U.S. adults in the workforce has increased slightly for older age groups over the ... The proportion of U.S. adults in the workforce has increased slightly for older age groups over the ...
Primary Groups: Families Primary Groups: Families
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