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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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There are approximately 3 million unintended pregnancies in the United States each year.

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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

The experiment of Plaxton and his colleagues demonstrated that plants can alter their metabolism in The experiment of Plaxton and his colleagues demonstrated that plants can alter their metabolism in
A laboratory experiment verified evaporative cooling by the cicada, Diceroprocta apache A laboratory experiment verified evaporative cooling by the cicada, Diceroprocta apache
Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a
Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Historical Time Line of Regulatory Acts, Standards, and Organizations Historical Time Line of Regulatory Acts, Standards, and Organizations
First Line Antitubercular Drugs First Line Antitubercular Drugs
Video: Fertilization and Development

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