41There are 41 countries that recognize sign language as an official language.
There are estimated to be 72 million deaf people around the world. There are also about 300 different sign languages—including American Sign Language and International Sign Language—as well as 41 countries that recognize them as an official language.
42The global adult literacy rate is around 86 percent.
With each generation that passes, more and more people are learning how to read, according to the United Nations Educational, Scientific, and Cultural Organization (UNESCO). These days, around 86 percent of adults around the world are able to enjoy a book. UNESCO also explained that their data shows "remarkable improvement among youth in terms of reading and writing skills and a steady reduction in gender gaps. Fifty years ago, almost one-quarter of youth lacked basic literacy skills compared to less than 10 percent in 2016."
43Facebook has more users than the population of the U.S., China, and Brazil combined.
Do you use Facebook? If you don't, you're among a number that gets increasingly smaller every day. In fact, 2 billion active users have an account on the social media platform, which is more than the population of the United States, China, and Brazil combined. Facebook's co-founder and CEO Mark Zuckerberg posted about the milestone, saying, "We're making progress connecting the world, and now let's bring the world closer together."
44There are only two countries with names that begin with "The."
You might find yourself saying "the" before various countries and place names when referring to them thanks to grammar and common pronunciation, which is why we say the United States or the Maldives. However, only The Gambia and The Bahamas formally include "the" in their nation's names.
45All the ants on Earth weigh about as much as all the humans.
The total population of people who are alive on Earth hasn't even hit 8 billion. At the same time, there are 10 quadrillion (10,000,000,000,000,000) individual ants crawling around at any given time. According to wildlife presenter Chris Packham, who appeared on the BBC, when combined, all of those ants would weigh about the same as all of us humans.
However, Francis Ratnieks, professor of apiculture at the University of Sussex, disagrees. He says that while this fact may have been true in the past, these days "we must also remember that humans are getting fatter all the time. We're not just increasing in population, we're increasing in fatness, so I think we've left the ants behind."
46The oceans contain almost 200,000 different kinds of viruses.
The next time you feel like taking a dip in the big blue ocean, you might not want to think about the fact that the seemingly pristine water is home to almost 200,000 different kinds of viruses. While this may sound scary, Matthew Sullivan, a microbiologist at the Ohio State University, told CNN, "Having that road map [of what viruses exist] helps us do a lot of the things we'd be interested in to better understand the ocean and, I hate to say it, but maybe to have to engineer the ocean at some point to combat climate change."
47New Zealanders have more pets per household than any other country.
People who live in New Zealand seem to love having an animal companion around. That's why 68 percent of households in the country have a pet, which is more than any other nation in the world. Americans also happen to love furry friends, which is why more than half of all U.S. homes have either a dog or cat (or both).
48Tokyo is the world's largest city with 37 million inhabitants.
Tokyo is a booming city—not only by Japanese standards, but also compared to cities around the world. With around 37 million people living in Tokyo, it's the world's largest city when it comes to population size, according to Reuters. The next largest city is Delhi, India, (population 29 million) and Shanghai, China (population 26 million).
49Interpol began in 1914 when legal professionals from 24 countries got together to discuss catching fugitives.
These days, Interpol (or the International Criminal Police Organization) may be well-known for tracking down outlaws around the world. But the group dates all the way back to 1914 when the International Criminal Police Congress was held in Monaco. That meeting saw police and judicial representatives from 24 countries get together with the goal of improving contacts between police forces in different countries in order to increase the effectiveness of international investigations.
50Nearly two people die each second.
While four babies are born on Earth every second, it's estimated that around two people pass away at the same time. That means that 105 people die each minute, 6,316 people die each hour, 151,600 people die each day, and 55.3 million people die each year. Sorry, folks—not all interesting facts are fun!