Measles once killed millions every year. Vaccines changed this, preventing disease, long-term immune damage, and deadly outbreaks.<br><br><a href="https://ourworldindata.org/measles-vaccines-save-lives" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/5f66d86d-91f5-4839-caa7-d6c5ce64e300/w=1350"/></a>

It’s difficult to compare countries because they don’t always measure infant mortality in the same way.<br><br><a href="https://ourworldindata.org/where-are-babies-at-lowest-risk-of-dying" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/39d23685-afc7-46b8-2018-8813c041c100/w=1350"/></a>

In most rich countries, child mortality has more than halved in the last thirty years; we know we can go further.<br><br><a href="https://ourworldindata.org/child-mortality-rich-countries-decline" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/0f13d2cd-7f47-4f84-22a3-b1014dd1e500/w=1350"/></a>

A story of how our work helps journalists who use data.<br><br><a href="https://ourworldindata.org/how-journalist-the-economist-uses-owid" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/f403b7ed-e0ba-4614-0740-2f546e3d3100/w=1350"/></a>

Data from large meta-analyses show that measles vaccination is highly effective and safe, giving a 95% reduction in the risk of measles.<br><br><a href="https://ourworldindata.org/measles-vaccine-effectiveness-safety" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/1d042616-0031-4929-ef74-a0d7a3176000/w=1350"/></a>

Foreign aid measurement is complicated — what exactly counts as Official Development Assistance, what doesn’t, and how much is actually spent abroad?<br><br><a href="https://ourworldindata.org/what-is-foreign-aid" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/45c115b3-453b-4d01-6ded-31b0e8570700/w=1350"/></a>

A breakdown of the sources of many air pollutants that damage our health and ecosystems.<br><br><a href="https://ourworldindata.org/air-pollution-sources" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/5a98a347-7411-40c8-4c1b-30a542d22f00/w=1350"/></a>

In many countries, a significant share of aid is spent domestically on hosting refugees, offering student scholarships, and administrative costs.<br><br><a href="https://ourworldindata.org/foreign-aid-domestic-overseas" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/78a7ce1c-2086-4716-c5dc-30f130bbee00/w=1350"/></a>

Most countries spend less than 1% of their national income on foreign aid; even small increases could make a big difference.<br><br><a href="https://ourworldindata.org/foreign-aid-donations-increase" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/486658e7-cc1e-4bed-f5a7-4c66b7ced500/w=1350"/></a>

The world is warming despite natural fluctuations from the El Niño cycle.<br><br><a href="https://ourworldindata.org/global-temperatures-el-nino-la-nina" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/40c0d7fb-f503-45b1-8eda-8cc001f4dd00/w=1350"/></a>

The baby boom reshaped family life and drove population growth in many countries. In this article, we explore the key patterns in seven charts.<br><br><a href="https://ourworldindata.org/baby-boom-seven-charts" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/8ef118fd-a238-4212-76af-2674b5b4d300/w=1350"/></a>

The fertility rate is commonly confused with the eventual number of births per woman. This can result in misinterpreting the impact of policies and trends over time.<br><br><a href="https://ourworldindata.org/total-fertility-rate-births-per-woman" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/07feefbb-15b0-4bbe-6a26-894e38507400/w=1350"/></a>

Data on fertility rates, ages of mothers and fathers at childbirth, twin births, reproductive technologies, contraception, and more.<br><br><a href="https://ourworldindata.org/fertility-rate" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/22159485-fcb9-4811-8ca9-93644ffade00/w=1350"/></a>

Air pollution tends to get worse before it gets better, but how can we accelerate this transition?<br><br><a href="https://ourworldindata.org/cleanest-air-lessons" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/2634177d-6b60-4df5-3152-c38263399f00/w=1350"/></a>

An honorary doctorate from KU Leuven & UCLouvain and a “Dove of Peace” in Germany.<br><br><a href="https://ourworldindata.org/max-roser-received-two-prestigious-honors" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/679eea1d-ea22-4824-cccd-6b2044447a00/w=1350"/></a>

Maternal mortality was much more common in the past. It is much lower today, but global inequalities are still large.<br><br><a href="https://ourworldindata.org/maternal-deaths-save-mothers" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/1a2ccaa1-7f25-4250-6151-acd5affb0400/w=1350"/></a>

Check out the new video from Oxford Social Sciences, where Max shares his journey with this project.<br><br><a href="https://ourworldindata.org/watch-max-roser-share-our-world-in-data-story" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/a44cfeae-4550-44ed-1444-3b04c04ad800/w=1350"/></a>

Estimates range from less than $1 trillion to $7 trillion. Where do these numbers come from?<br><br><a href="https://ourworldindata.org/how-much-subsidies-fossil-fuels" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/58092c37-e5b8-42af-8d79-60234c162400/w=1350"/></a>

We are very excited to share that Claire Melamed and Michael Blastland have joined our Board of Trustees.<br><br><a href="https://ourworldindata.org/new-trustees-claire-melamed-michael-blastland" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/a012091e-33f8-4e5e-c5c7-6993c6f70200/w=1350"/></a>

The path to recent advanced AI systems has been more about building larger systems than making scientific breakthroughs.<br><br><a href="https://ourworldindata.org/scaling-up-ai" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/ded84c3a-78c9-40c4-ace2-6bf8dd7c4f00/w=1350"/></a>