Leenheer is best known for creating HTML5test.com, the WhichBrowser user-agent parser. He began exploring a CSS-based Doom ...

Images are the Largest Contentful Paint element on 85% of desktop pages and 76% of mobile pages, according to the 2025 HTTP ...

For more than 160 years, the National Academies have provided nonpartisan, evidence-based advice on decisions that affect our nation. Browse the listing of projects and activities to see examples of ...

There needs to be a future in which cities provide opportunities for all, with access to basic services, energy, housing, transportation and more.