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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

A Mitochondrion Converts Energy from Fuel Molecules into ATP A Mitochondrion Converts Energy from Fuel Molecules into ATP
Representations of molecules Representations of molecules
Absorption of ultraviolet light by aromatic amino acids Absorption of ultraviolet light by aromatic amino acids
Changes in the free energy (DG) of exergonic and endergonic reactions Changes in the free energy (DG) of exergonic and endergonic reactions
The biochemical reactions of near-infrared light The biochemical reactions of near-infrared light
Nucleic acids. Nucleic acids.
Video: Dorsal Recumbent Position

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