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There are more sensory neurons in the tongue than in any other part of the body.
In 1864, the first barbiturate (barbituric acid) was synthesized.
People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.