Our World in Data
@ourworldindata.org
Research and data to make progress against the world’s largest problems. Based out of Oxford University (@ox.ac.uk), founded by @maxroser.bsky.social.
Hannah was awarded the honorary “Inspiration from Abroad”, for those living outside the Czech Republic who effectively communicate about climate change.
Congratulations, Hannah!
Read more about the award: www.cenazaklima.cz/aktualne/
Congratulations, Hannah!
Read more about the award: www.cenazaklima.cz/aktualne/
Aktuálně – CENAZAKLIMA.CZ
CENAZAKLIMA.CZ
www.cenazaklima.cz
December 3, 2025 at 6:09 PM
Hannah was awarded the honorary “Inspiration from Abroad”, for those living outside the Czech Republic who effectively communicate about climate change.
Congratulations, Hannah!
Read more about the award: www.cenazaklima.cz/aktualne/
Congratulations, Hannah!
Read more about the award: www.cenazaklima.cz/aktualne/
(This Data Insight was written by @simonvanteutem.bsky.social.)
To learn more, read our colleague @maxroser.bsky.social's article on the progress made in reducing child mortality: ourworldindata.org/child-mortal...
To learn more, read our colleague @maxroser.bsky.social's article on the progress made in reducing child mortality: ourworldindata.org/child-mortal...
Child mortality: an everyday tragedy of enormous scale that we can make progress against
We live in a world in which ten children die every minute.
ourworldindata.org
December 2, 2025 at 3:03 PM
(This Data Insight was written by @simonvanteutem.bsky.social.)
To learn more, read our colleague @maxroser.bsky.social's article on the progress made in reducing child mortality: ourworldindata.org/child-mortal...
To learn more, read our colleague @maxroser.bsky.social's article on the progress made in reducing child mortality: ourworldindata.org/child-mortal...
If conditions in Africa improved enough to match Asia’s current child mortality rate (2%), 1.9 million of these 2.84 million children would survive.
If the child mortality rate were to drop to the European rate (0.4%), then 2.64 million children would be saved each year.
If the child mortality rate were to drop to the European rate (0.4%), then 2.64 million children would be saved each year.
December 2, 2025 at 3:03 PM
If conditions in Africa improved enough to match Asia’s current child mortality rate (2%), 1.9 million of these 2.84 million children would survive.
If the child mortality rate were to drop to the European rate (0.4%), then 2.64 million children would be saved each year.
If the child mortality rate were to drop to the European rate (0.4%), then 2.64 million children would be saved each year.
The chart above shows a simple hypothesis: how many more African children would reach the age of five if it had the same child mortality rates as other regions?
December 2, 2025 at 3:03 PM
The chart above shows a simple hypothesis: how many more African children would reach the age of five if it had the same child mortality rates as other regions?
In 2023, 2.84 million children in Africa died before reaching their fifth birthday, giving the continent the highest child mortality rate of any region (5.9%).
December 2, 2025 at 3:03 PM
In 2023, 2.84 million children in Africa died before reaching their fifth birthday, giving the continent the highest child mortality rate of any region (5.9%).
That's right. The paper this visualization is based on gives their values as ≈22 Mt (land) and ≈39 Mt (sea). Each square in the chart is roughly 11 Mt, so two squares for land and three (rounded for simplicity) for marine.
December 1, 2025 at 11:46 AM
That's right. The paper this visualization is based on gives their values as ≈22 Mt (land) and ≈39 Mt (sea). Each square in the chart is roughly 11 Mt, so two squares for land and three (rounded for simplicity) for marine.
Read more in our new article today by @hannahritchie.bsky.social and @spoonerf.bsky.social, “Almost all of the world’s mammal biomass is humans and livestock”: ourworldindata.org/wild-mammals...
Almost all of the world’s mammal biomass is humans and livestock
Humans and livestock make up 95% of the world’s mammal biomass; wild mammals are just 5%.
ourworldindata.org
December 1, 2025 at 10:12 AM
Read more in our new article today by @hannahritchie.bsky.social and @spoonerf.bsky.social, “Almost all of the world’s mammal biomass is humans and livestock”: ourworldindata.org/wild-mammals...
Farmed pigs weigh as much as all of the world’s whales, orcas, sea otters, seals, and dolphins combined. All the dogs in the world, including pets and feral dogs, weigh as much as all wild mammals on land.
December 1, 2025 at 10:12 AM
Farmed pigs weigh as much as all of the world’s whales, orcas, sea otters, seals, and dolphins combined. All the dogs in the world, including pets and feral dogs, weigh as much as all wild mammals on land.
Beyond the totals for humans, livestock, and wild animals, there are a few striking comparisons that we found surprising.
December 1, 2025 at 10:12 AM
Beyond the totals for humans, livestock, and wild animals, there are a few striking comparisons that we found surprising.
Our biomass is more than seven times greater than all wild mammals combined.
Our livestock and pets, which are primarily cattle, account for 59%.
That leaves just 5% as wild mammals, which includes thousands of different species, from elephants and deer to lions and whales.
Our livestock and pets, which are primarily cattle, account for 59%.
That leaves just 5% as wild mammals, which includes thousands of different species, from elephants and deer to lions and whales.
December 1, 2025 at 10:12 AM
Our biomass is more than seven times greater than all wild mammals combined.
Our livestock and pets, which are primarily cattle, account for 59%.
That leaves just 5% as wild mammals, which includes thousands of different species, from elephants and deer to lions and whales.
Our livestock and pets, which are primarily cattle, account for 59%.
That leaves just 5% as wild mammals, which includes thousands of different species, from elephants and deer to lions and whales.
The chart shows a breakdown of land and marine mammals in terms of biomass — the total weight of all animals of a given species. Each square represents one percent of the world’s mammal biomass.
The dominance of humans is clear. We account for more than one-third of mammal biomass.
The dominance of humans is clear. We account for more than one-third of mammal biomass.
December 1, 2025 at 10:12 AM
The chart shows a breakdown of land and marine mammals in terms of biomass — the total weight of all animals of a given species. Each square represents one percent of the world’s mammal biomass.
The dominance of humans is clear. We account for more than one-third of mammal biomass.
The dominance of humans is clear. We account for more than one-third of mammal biomass.
(This Data Insight was written by @simonvanteutem.bsky.social.)
Explore homicide rates for more countries: ourworldindata.org/grapher/homi...
Explore homicide rates for more countries: ourworldindata.org/grapher/homi...
Homicide rate
Annual number of deaths from homicide per 100,000 people.
ourworldindata.org
November 29, 2025 at 10:53 AM
(This Data Insight was written by @simonvanteutem.bsky.social.)
Explore homicide rates for more countries: ourworldindata.org/grapher/homi...
Explore homicide rates for more countries: ourworldindata.org/grapher/homi...
Because the risks are different, the most effective responses may differ too. For women, reducing intimate partner violence is a key priority.
For men, prevention is more often tied to crime, gangs, and violence among acquaintances or strangers.
For men, prevention is more often tied to crime, gangs, and violence among acquaintances or strangers.
November 29, 2025 at 10:53 AM
Because the risks are different, the most effective responses may differ too. For women, reducing intimate partner violence is a key priority.
For men, prevention is more often tied to crime, gangs, and violence among acquaintances or strangers.
For men, prevention is more often tied to crime, gangs, and violence among acquaintances or strangers.
We can see that for men, most of these murders were committed by friends, neighbors, acquaintances, or strangers (shown as “Other” in the chart) rather than a partner or family member. The opposite is true for women: intimate partners are the biggest threat.
November 29, 2025 at 10:53 AM
We can see that for men, most of these murders were committed by friends, neighbors, acquaintances, or strangers (shown as “Other” in the chart) rather than a partner or family member. The opposite is true for women: intimate partners are the biggest threat.
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ourworldindata.org
November 28, 2025 at 5:19 PM
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Check out all of today's edition of The OWID Brief: mailchi.mp/ourworldinda...
mailchi.mp
November 28, 2025 at 5:19 PM
Check out all of today's edition of The OWID Brief: mailchi.mp/ourworldinda...
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Stay up to date with our latest research and data insights by subscribing to our newsletter.
ourworldindata.org
November 27, 2025 at 12:54 PM
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(This Data Insight was written by @hannahritchie.bsky.social and Edouard Mathieu.)
Explore more insights and data on changes in fertility rates across the world: ourworldindata.org/fertility-rate
Explore more insights and data on changes in fertility rates across the world: ourworldindata.org/fertility-rate
Fertility Rate
Explore changing patterns in fertility worldwide, from birth rates to parental ages, twinning rates, reproductive technologies, and more.
ourworldindata.org
November 27, 2025 at 12:54 PM
(This Data Insight was written by @hannahritchie.bsky.social and Edouard Mathieu.)
Explore more insights and data on changes in fertility rates across the world: ourworldindata.org/fertility-rate
Explore more insights and data on changes in fertility rates across the world: ourworldindata.org/fertility-rate
Cohort fertility tells us how many children the average woman will actually have over her lifetime. In China, this cohort figure is likely higher than one, but still low enough that the population will continue to shrink.
November 27, 2025 at 12:54 PM
Cohort fertility tells us how many children the average woman will actually have over her lifetime. In China, this cohort figure is likely higher than one, but still low enough that the population will continue to shrink.