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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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).
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
![Old-growth redwood forest in western North America. Redwoods are the tallest trees in the world, wit](https://biology-forums.com/gallery/47/medium_33_28_08_11_12_01_59_15502383.jpeg)
![Like humans, monkeys need interaction to thrive. Those raised in isolation are unable to interact ...](https://biology-forums.com/gallery/47/medium_660365_19_12_16_11_52_41_243331117.png)