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Did you know?

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.

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f
Norman Bel Geddes, with Dr. Otto Koller, Air Liner Number 4. Norman Bel Geddes, with Dr. Otto Koller, Air Liner Number 4.
Determination of the number of theoretical stages Determination of the number of theoretical stages
Calculate the number of sodium ions in 0.375moles of Na2CO3.10H20 Calculate the number of sodium ions in 0.375moles of Na2CO3.10H20
A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is: A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is:
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Video: Cell mediated immune response to a viral infection Animation

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