All the Biomass of Earth, in One Graphic
Our planet supports approximately 8.7 million species, of which over a quarter live in water.
But humans can have a hard time comprehending numbers this big, so it can be difficult to really appreciate the breadth of this incredible diversity of life on Earth.
In order to fully grasp this scale, we draw from research by Bar-On et al. to break down the total composition of the living world, in terms of its biomass, and where we fit into this picture.
A “carbon-based life form” might sound like something out of science fiction, but that’s what we and all other living things are.
Carbon is used in complex molecules and compounds—making it an essential part of our biology. That’s why biomass, or the mass of organisms, is typically measured in terms of carbon makeup.
In our visualization, one cube represents 1 million metric tons of carbon, and every thousand of these cubes is equal to 1 Gigaton (Gt C).
Here’s how the numbers stack up in terms of biomass of life on Earth:
|Taxon||Mass (Gt C)||% of total|
Plants make up the overwhelming majority of biomass on Earth. There are 320,000 species of plants, and their vital photosynthetic processes keep entire ecosystems from falling apart.
Fungi is the third most abundant type of life—and although 148,000 species of fungi have been identified by scientists, it’s estimated there may be millions more.
Animals: A Drop in the Biomass Ocean
Although animals make up only 0.47% of all biomass, there are many sub-categories within them that are worth exploring further.
|Taxon||Mass (Gt C)||% of Animal Biomass|
Arthropods are the largest group of invertebrates, and include up to 10 million species across insects, arachnids, and crustaceans.
The category of chordates includes wild mammals, wild birds, livestock, humans, and fish. Across 65,000 living species in total, nearly half are bony fish like piranhas, salmon, or seahorses.
Surprisingly, humans contribute a relatively small mass compared to the rest of the Animal Kingdom. People make up only 0.01% of all the biomass on the planet.
Annelids, Mollusks, Cnidarians, and Nematodes
Annelids are segmented worms like earthworms or leeches, with over 22,000 living species on this planet. After arthropods, mollusks are the second-largest group of invertebrates with over 85,000 living species. Of these, 80% are snails and slugs.
Cnidarians are a taxon of aquatic invertebrates covering 11,000 species across various marine environments. These include jellyfish, sea anemone, and even corals.
Nematodes are commonly referred to as roundworms. These sturdy critters have successfully adapted to virtually every kind of ecosystem, from polar regions to oceanic trenches. They’ve even survived traveling into space and back.
The Microscopic Rest
Beyond these animals, plants, and fungi, there are an estimated trillion species of microbes invisible to the naked eye—and we’ve probably only discovered 0.001% of them so far.
Bacteria were one of the first life forms to appear on Earth, and classified as prokaryotes (nucleus-less). Today, they’re the second-largest composition of biomass behind plants. Perhaps this is because these organisms can be found living literally everywhere—from your gut to deep in the Earth’s crust.
Researchers at the University of Georgia estimate that there are 5 nonillion bacteria on the planet—that’s a five with 30 zeros after it.
Protists and Archaea
Protists are mostly unicellular, but are more complex than bacteria as they contain a nucleus. They’re also essential components of the food chain.
Archaea are single-celled microorganisms that are similar to bacteria but differ in compositions. They thrive in extreme environments too, from high temperatures above 100°C (212°F) in geysers to extremely saline, acidic, or alkaline conditions.
Viruses are the most fascinating category of biomass. They have been described as “organisms at the edge of life,” as they are not technically living things. They’re much smaller than bacteria—however, as the COVID-19 pandemic has shown, their microscopic effects cannot be understated.
The Earth’s Biomass, Under Threat
Human activities are having an ongoing impact on Earth’s biomass.
For example, we’ve lost significant forest cover in the past decades, to make room for agricultural land use and livestock production. One result of this is that biodiversity in virtually every region is on the decline.
Will we be able to reverse this trajectory and preserve the diversity of all the biomass on Earth, before it’s too late?
Editor’s note: This visualization was inspired by the work of Javier Zarracina for Vox from a few years ago. Our aim with the above piece was to recognize that while great communication needs no reinvention, it can be enhanced and reimagined to increase editorial impact and help spread knowledge to an even greater share of the population.
Visualizing the Odds of Dying from Various Accidents
This infographic shows you the odds of dying from a variety of accidents, including car crashes, bee stings, and more.
Infographic: The Odds of Dying from Various Accidents
Fatal accidents account for a significant number of deaths in the U.S. every year. For example, nearly 43,000 Americans died in traffic accidents in 2021.
Without the right context, however, it can be difficult to properly interpret these figures.
To help you understand your chances, we’ve compiled data from the National Safety Council, and visualized the lifetime odds of dying from various accidents.
Data and Methodology
The lifetime odds presented in this graphic were estimated by dividing the one-year odds of dying by the life expectancy of a person born in 2020 (77 years).
Additionally, these numbers are based on data from the U.S., and likely differ in other countries.
|Type of Accident||Lifetime odds of dying (1 in #)|
|Motor vehicle accident||101|
|Complications of medical and surgical care||798|
|Accidental building fire||1,825|
|Choking on food||2,745|
|Drowning in swimming pool||5,782|
|Accidental firearm discharge||7,998|
|Bee or wasp sting||57,825|
For comparison’s sake, the odds of winning the Powerball jackpot are 1 in 292,000,000. In other words, you are 4000x more likely to die by a lightning strike over your lifetime than to win the Powerball lottery.
Continue reading below for further context on some of these accidents.
Motor Vehicle Accidents
Motor vehicle accidents are a leading cause of accidental deaths in the U.S., with a 1 in 101 chance of dying. This is quite a common way of dying, especially when compared to something like bee stings (1 in 57,825).
Unfortunately, a major cause of vehicle deaths is impaired driving. The CDC reports that 32 Americans are killed every day in crashes involving alcohol, which equates to one death every 45 minutes.
For further context, consider this: 30% of all traffic-related deaths in 2020 involved alcohol-impaired drivers.
The odds of drowning in a swimming pool (1 in 5,782) are significantly higher than those of drowning in general (1 in 10,386). According to the CDC, there are 4,000 fatal drownings every year, which works out to 11 deaths per day.
Drowning also happens to be a leading cause of death for children. It is the leading cause for kids aged 1-4, and second highest cause for kids aged 5-14.
A rather surprising fact about drowning is that 80% of fatalities are male. This has been attributed to higher rates of alcohol use and risk-taking behaviors.
Accidental Firearm Discharge
Lastly, let’s look at accidental firearm deaths, which have lifetime odds of 1 in 7,998. That’s higher than the odds of drowning (general), as well as dying in an airplane accident.
This shouldn’t come as a major surprise, since the U.S. has the highest rates of gun ownership in the world. More importantly, these odds highlight the importance of properly securing one’s firearms, as well as learning safe handling practices.
As a percentage of total gun-related deaths (45,222 in 2020), accidental shootings represent a tiny 1%. The two leading causes are suicide (54%) and homicide (43%).
Interested in learning more about death? Revisit one of our most popular posts of all time: Visualizing the History of Pandemics.
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