How fast did T. Rexes grow? How does knowing this impact our understanding of dinosaur diets and lives?
Category: line graph
Global Plastic Production (with projections, 1950 to 2060)
How much plastic is produced across the world? If we continue with "business as usual," how much plastic will our earth be saddled with by 2060?
Percent of U.S. Undergraduates Diagnosed with a Mental Illness
How many US undergrads are diagnosed with mental illness? How has this changed over time?
Prevalence of Anxiety by Age/Generation in the US
Are young people today more anxious than previous generations? What's going on?
Comparing Climate in London and Singapore
How do the climates of London and Singapore compare? How do the actual average temperatures compare with the perceived temperatures? When would you want to visit either place?
Lottery Sales per Adult, by Income Level
Who spends the most on lottery tickets in the US? How does household income factor in?
The Size of the World’s Population — With Predictions Through 2060
Our World in Data mapped out the UN's predictions for the size of the world population. The rate of change is pretty astounding -- with some interesting twists when we look closer.
Life Expectancy Compared with GDP
Make a list of the countries where people live the longest. Would the list just read as a list of richest countries? Why or why not? Check out these scatterplots: one that focuses on comparing Latin America with other nations, and one that shows the whole world.
Who are America’s Breadwinners: Five Decades of Societal Shifts
Who are America's breadwinners? How has this changed in the last 50 years?
Fewer Teens are Reading for Fun
A line graph from Chartr's newsletter illustrates a decrease in teenagers' recreational reading, according to 2023 data from the National Center for Education Statistics. The graph presents a potential discussion about literacy, reading, and education, with mathematical elements including percentages, value estimation, and y-axis scaling.
Comparing the Number of Fires with the Amount of Emissions in Canadian Fires (2002-2019)
The number of yearly wildfires in Canada has stayed about the same or decreased. So why is the total yearly emissions from wildfires increasing dramatically?
Fires in Canada (2002-2019): Number of Fires and Number of Acres Burned
Smoke from the Canadian fires are impacting people across North America. Have we hit peak fire season yet?
The Number of Female CEOs Is Rising
In 2015, there were more CEOs of S&P 500 companies named John or Jon than there were CEOs that were women. How has this changed in the years since?
The Arctic Ice Cover is Receding
The Arctic sea ice cover grows and shrinks over the course of the year, but it's typically at its greatest coverage during the month of March. How does this look from year to year? How can data encourage us to take action?
History of Calculating π: Number of Accurate Digits
It's almost π day (3/14 in the US)! Some people like to try to memorize π. Is it possible for them to memorize all the known digits? How many digits ARE known, and how has our knowledge of π changed over time?
Ozone Depleting Substance Emissions, 1960-2016
Finally: a climate crisis success story! Why don't we hear about the ozone anymore? And what caused the ozone-depleting substance emissions to dramatically decrease across the world?
Mobile Internet Traffic in Iran — September 21, 2022
Why was there a huge dip in internet traffic within Iran on September 21, 2022?
Ukrainian Refugees Return Home Despite Warnings Not To
Ukrainian refugees are returning home, despite warnings about safety. How many are returning home? And why?
TikTok is Hitting Revenue Milestones at Lightning Speed
TikTok is Hitting Revenue Milestones at Lightning Speed graph from Chartr; slow reveal by Jenna Laib (@jennalaib) (Slide Deck includes notes and questions to elicit discourse) Type of Graph: line graph Visualization Source: Chartr Daily, “TikTok is Hitting Revenue Milestones At Lightning Speed.” Instagram: July 6, 2022. Data Source: WSJ, Company Filings, Various Media Repots, Insider Intelligence Paired Texts: Ortiz-Ospina, Esteban.… Continue reading TikTok is Hitting Revenue Milestones at Lightning Speed
How Halloween Overtook the Day of the Day in Mexico
How Halloween overtook the Day of the Dead in Mexico