species Archives

How many species of living things exist? So far, scientists have identified, classified, and named 1.2 million species, according to worldatlas.com. The same source states there are about 8.7 million species on Earth. Nobody knows for certain, but other estimates—excluding viruses and bacteria—range from 10 million to 100 million species. Why are there so many species of living things?

How quickly are scientists discovering and describing new species? According to worldatlas.com, they identify and assign genus and species names to 15,000 to 18,000 new species each year. At that rate, if we assume 1.2 million have already been named and there are 10 million in total, the task will take over 500 years, but that’s a conservative estimate. Clearly, biologists still have a lot of work ahead.

There are between six and seven thousand known mammal species according to ourworldindata.org, . But the insect world surpasses that number. For example, beetle species alone number between 350,000 and 400,000. Each year, biologists identify most of the “new species” from museum specimens discovered earlier but not carefully studied. Some species in the wild are facing extinction, and some specimens in museums may already be extinct.

We may ask, “Why are there so many species?” God created diverse kinds of living things and endowed them with the ability to adapt to different environments. Each new species fills a niche in the incredible diversity of animal and plant life that makes our existence possible.

We have previously described the various taxonomic classifications used to categorize living things. (You can read that HERE.) “Species” is the lowest and most specific taxonomic category used by scientists to describe life forms. God created humans with an insatiable curiosity and an amazing ability to organize and categorize information. Then, He gave us plenty of life forms to study. We believe that we can learn more about God as we explore His creations. (Romans 1:20)

Atheists often challenge us with the widely quoted statistic that “95 to 99 percent of all creatures that have ever lived are now extinct.” Their argument is that if there were a wise God who created life, he would have done a better job. The skeptics are assuming that they know the purpose for which a wise God would have created those life-forms. Perhaps the extinct species had a purpose of preparing the Earth for humans, and they went extinct because they had served their purpose. But I am assuming that humans are the pinnacle and ultimate purpose of God’s creation. Atheists reject that idea. One of our skeptical followers recently posted a comment referring to “the virus called man,” as if humans are a blight on an otherwise good world.

Another possibility is that perhaps the statistic of extinct species is highly exaggerated. Since the life-forms that have gone extinct are no longer around, how do scientists determine how many species have gone extinct since life began? The number of fossils of extinct species we have actually found is estimated to be about 250,000. So we have direct evidence of a quarter of a million extinct species. According to National Geographic (May 2014), there are at least 1.9 million animal species today and at least 450,000 plant species. If it’s true that 95 percent of the animal species have gone extinct and there are 1.9 million living today, that means that over 36 million have gone extinct. If we have fossils of only 250,000 extinct species (plants and animals) how do we know that there were 36 million others for which we have no evidence? According to National Geographic (May 2014), Stuart Pimm, a conservation ecologist at Duke University, and his colleagues “reviewed data from fossil records and noted when species disappeared, then used statistical modeling to fill in holes in the record.” In other words, they are filling in the “holes” or “missing links” in the evolutionary record to determine how many other species must have existed that disappeared without a trace.

The questions we might want to ask are, “Why do we have fossils of only 250,000 species out of 36,000,000? Why are we assuming that 36,000,000 species have gone extinct based on the evidence of fossils totaling less than seven-tenths of one percent of that number?” The answer to those questions is apparently the fact that naturalistic evolution from single-celled life to humans requires us to make that assumption. Perhaps this gives us something to ponder.
–Roland Earnst © 2017

Tag: species

Why Are There So Many Species?

How Many Extinct Species?