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Image credits

Every theme photo on freequiz is public domain or CC0. Here is where each one comes from and what we changed. We never add colour grades or AI edits.

Geography

Image
Image: NASA
Author
NASA Goddard Space Flight Center (Suomi NPP VIIRS, Blue Marble 2012)
Licence
NASA media, generally not subject to US copyright (NASA Images and Media Usage Guidelines)
Source
images.nasa.gov
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

History

Image
Armor for Field and Tournament, ca. 1575-80. The Metropolitan Museum of Art (CC0)
Author
Italian, probably Milan maker, unknown; Armor for Field and Tournament, ca. 1575-80; The Metropolitan Museum of Art
Licence
CC0 1.0 (Met Open Access, isPublicDomain=true)
Source
metmuseum.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

General knowledge

Image
Photo: Joe Shillington, CC0, via Wikimedia Commons
Author
Joe Shillington joeshillington
Licence
CC0 1.0 (Wikimedia Commons file page, Cc-zero tag)
Source
commons.wikimedia.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Science

Image
Image: NASA/JPL/Space Science Institute
Author
NASA/JPL/Space Science Institute (Cassini; record secondary_creator)
Licence
NASA media, generally not subject to US copyright (NASA Images and Media Usage Guidelines)
Source
images.nasa.gov
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Arts and literature

Image
Mont Sainte-Victoire, Paul Cézanne, ca. 1902-6. The Metropolitan Museum of Art (CC0)
Author
Paul Cézanne; Mont Sainte-Victoire, ca. 1902-6; The Metropolitan Museum of Art
Licence
CC0 1.0 (Met Open Access, isPublicDomain=true)
Source
metmuseum.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Human body

Image
Photo: Joshua Earle, CC0, via Wikimedia Commons
Author
Joshua Earle joshuaearle
Licence
CC0 1.0 (Wikimedia Commons file page, Cc-zero tag)
Source
commons.wikimedia.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Food

Image
Photo: Wilfredor, CC0, via Wikimedia Commons
Author
Wilfredor
Licence
CC0 1.0 (Wikimedia Commons file page, Cc-zero tag)
Source
commons.wikimedia.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Animals and nature

Image
Photo: USFWS (public domain)
Author
U.S. Fish and Wildlife Service, Northeast Region (Credit: USFWS)
Licence
Public Domain Mark 1.0 (Flickr page)
Source
flickr.com
Changes
master q85, not resized (original long edge 1984px, below 2400); sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

Famous people

Image
Microscope, Claude-Siméon Passemant, ca. 1750. The Metropolitan Museum of Art (CC0)
Author
Claude-Siméon Passemant; Microscope, ca. 1750; The Metropolitan Museum of Art
Licence
CC0 1.0 (Met Open Access, isPublicDomain=true)
Source
metmuseum.org
Changes
resized master 2400px q85; sRGB; metadata stripped. Build: 3:2 crop per crop-hints.json, 320/640/960 AVIF+WebP; OG crop. No grade.

freequiz is not affiliated with, or endorsed by, NASA, The Metropolitan Museum of Art, the U.S. Fish and Wildlife Service, Wikimedia Commons, Flickr or any of the artists and photographers listed here.