Because we're unique and competely different from other living things.
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Yes, the earth is the only planet where humans live. The probability of finding the exact same species living on another plant is zero.
Currently now there is but during the days of the caveman there was seven more species of human but in the end we were the more advanced in brains
Tricky question... Scientists have described and given scientific names to about 920,000 species of insects in the world, which is impressive since mammals (of which humans are one) only have approximately 4,000 known species. As for your actual question... It is estimated that there are 20-30 million species of insects on the earth at present. In a good year, taxonomists throughout the world describe and name about 2,000 species of insects.
Probably not, lice are very specialized and only inhabit one species of host. Most kinds of lice are found only on specific types of animal, and, in some cases, only to a particular part of the body; some animals are known to host up to fifteen different species, although one to three is typical for mammals, and two to six for birds.
It is difficult to pinpoint a single species as the most dangerous, as it can vary based on context. However, some of the most dangerous species to humans include mosquitoes (due to diseases they transmit), humans themselves (due to warfare and violence), and certain venomous animals like snakes and spiders.
Bacteria outnumber humans by approximately 100 million to 1. Bacteria are unicellular microorganisms found in almost every habitat on Earth, including soil, water, and even inside our bodies.
Yes, insects are the most abundant group of animals on Earth. There are an estimated 10 quintillion individual insects alive at any one time, outnumbering all other animals.