In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In...

Is the world overpopulated or underpopulated? While we worry about there being too many people for the planet to support, we can also worry about how fewer people in a given place may affect the economy, what may happen when there are...

Population statistics are like crystal balls -- when examined closely, they can help predict a country's future (and give important clues about the past). Kim Preshoff explains how using a visual tool called a population pyramid helps...

In this lesson, students will learn how to determine population growth using an exponential formula. They will review solving for exponents and learn how to deal with exponents inside logarithms. Through examples and calculations, they...

Since the dawn of humanity, an estimated 100.8 billion people have lived and died, a number that increases by about 0.8% of the world's population each year. What happens to all of those peoples' bodies after they die? And will the...

The bubonic plague, which killed around 1/5 of the world's population in the 14th century, is still around today -- but it now claims only a few thousand lives each year. How did that number shrink so drastically? Sharon N. DeWitte...

Why is Japan's population ageing? What impacts could this have on the country in future? And how is the government trying to tackle the problem? Human Geography - A Changing World - Learning Points. Japan, like many developed countries,...

In this video lesson, students will understand that each digit represents a place value and that moving to the left increases the value by an order of 10. By comparing the digits from left to right, they will be able to determine which...

Learn about the 10 most populated countries in the world!

People in many countries greatly overestimate the number of Muslims living among them, often due to fear-based news and stereotypes. For example, Americans think 17% of the population is Muslim, when it's actually less than 1%. This...

When will India overtake China as the world's most populous country? Maths - Number A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s math films show abstract concepts in action in the real world.

By 2050, the number of Muslims around the world will nearly equal the number of Christians, as Islam will grow faster than any other major world religion.

This video is a lecture on dealing with big numbers in economics. The lecturer explains the importance of being able to interpret and write out large numbers, given the positive influence of population growth on economic activity and the...

In this video, students learn how to make rough comparisons of very large numbers using scientific notation. By understanding the concept of scientific notation and the power of 10, students can quickly estimate the magnitude of...

Express numbers in scientific notation.

Compare numbers using scientific notation.

Hans Rosling had a question: Do some religions have a higher birth rate than others -- and how does this affect global population growth? Speaking at the TEDxSummit in Doha, Qatar, he graphs data over time and across religions. With his...

Performance poet (and math student) Harry Baker spins a love poem about his favorite kind of numbers -- the lonely, love-lorn prime. Stay on for two more lively, inspiring poems from this charming performer.

Most of Humanity is in India and China because the ratio of human survival and occupation of the planet has always been similar, but modern advancements have allowed those numbers to increase exponentially, so the difference has become...

Most of Humanity is in India and China because the ratio of human survival and occupation of the planet has always been similar, but modern advancements have allowed those numbers to increase exponentially, so the difference has become...

As the world's population grows, how will we cope with the increasing demand for food? What would happen in a food crisis, and what can be done to prevent one? Human Geography - A Changing World - Learning Points. As the population of...

Millions of South American river turtle hatchlings have emerged along the Guaporé/Inténez River which is situated on the border of Brazil and Bolivia in the western Amazon Basin. An estimated 80,000 female turtles gather on the local...

While the population statistic is around 102 men : 100 women, the birth rate is more skewed. Approximately 107 men are born for every 100 women. However, over time that number seems to even out. Over the course of millions of years of...

While the population statistic is around 102 men : 100 women, the birth rate is more skewed. Approximately 107 men are born for every 100 women. However, over time that number seems to even out. Over the course of millions of years of...