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There are about 375,000 species of plants, with more being discovered each year. This includes seed plants, bryophytes, ferns and relatives of ferns called fern allies. Some 297,326 species of plants have been identified, of which 258,650 are flowering and 15,000 bryophytes (liverworts, hornworts, and mosses). All plants are photosynthetic, utilizing carbon dioxide, water and [...]
As of 2008, the United States has had seven left-handed Presidents in its history, and since both the Republican and Democratic nominees for President in 2008 were left-handed, the number is slated to become eight. Incidentally, only two of those Presidents have been Democratic, for those who were planning on making cracks about being on [...]
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Many people have heard some version of the saying “it takes X muscles to frown, but only Y muscles to smile,” with X usually being larger than Y, to suggest that it should be easier to smile than frown. The numbers in this saying can vary quite radically, however, and even when one accounts for [...]
The simple answer to this question is that almost half of the United States presidents to date have served more than one term as president. In fact, 20 presidents in all have served more than one full term in office. They were: Franklin D. Roosevelt, Thomas Jefferson, James Madison, James Monroe, Andrew Jackson, Ulysses S. [...]
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Insects are the most diverse group of animals on Earth. There are over a million described species of insect, and an estimated 6-10 million species total. Insects are found in nearly every above-ground environment, even in Antarctica, which has a species of insect called springtails. There is even a species of insect that lives on [...]
Tectonic plates are great slabs of rock which form the Earth’s crust. Both the continents and the oceans rest on tectonic plates, which float on the superheated, plastic mantle below. Over millions of years, these tectonic plates float around, driven by convection currents in the mantle, gathering into supercontinents and scattering again. This is called [...]
A neurotransmitter is a specialized messenger chemical that transfers or sends information from one type of cell to another. Scientists have managed to identify over 100 neurotransmitters in the human brain alone, but evidence suggests we have significantly more than this number. An unfortunate aspect of not being able to identify all neurotransmitter cells is [...]
Estimating the exact number of species of bacteria is impossible with today’s technology. To really move close to having an objective number, you’d have to have a machine that could process soil, water, and rock in large amounts, isolate the bacteria from their habitat, then sequence the genomes of as many bacteria as possible within [...]
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Determining the number of languages spoken in Africa can be complex mostly because it can be difficult to determine whether two languages are distinct or simply dialects of the same language. Still many agree that the number lies around 2,000. Some of the more common languages spoken in Africa include Hausa, Swahili, and Yoruba. Others, [...]
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