Silhouettes of people on an escalator in a shopping mall. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3299407/free-photo-image-architecture-banister-buildingFree Image from public domain licenseA woman spins a silver fidget toy in her hand; fidget spinners are a trending toy in 2017 that is popular among children and… https://www.rawpixel.com/image/5975397/photo-image-public-domain-hands-personFree Image from public domain licenseA road sign on the Cycle Superhighway2 at an island bus stop in Stratford High Street, Stratford, London. https://www.rawpixel.com/image/6083881/photo-image-public-domain-signFree Image from public domain licenseBlue and white luxury bath bomb on white towel, next to wooden bowl full of epsom salts and lit candle. https://www.rawpixel.com/image/5975418/photo-image-public-domain-wood-foodFree Image from public domain licenseBritish Airways Boeing 767-300 (G-BNWA) takes off (over my head) from London Heathrow Airport, England. The undercarriages… https://www.rawpixel.com/image/3340863/free-photo-image-animal-aircraft-airlinerFree Image from public domain licenseJim West Central Church Collierville TN Trees Blooming. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3372182/free-photo-image-blossom-cc0-cherryFree Image from public domain licenseArmillaria novae-zelandiae is one of three pathogen Armillaria species identified in New Zealand (the others are A. limonea… https://www.rawpixel.com/image/4023365/photo-image-plant-natureFree Image from public domain licenseTook these pics on some walks around my hometown Lupburg in Bavaria. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3372056/free-photo-image-amaryllidaceae-blossom-cc0Free Image from public domain licenseThis sculptural white puffy cloud stands alone creating light and shadow in a perfectly blue sky. https://www.rawpixel.com/image/5975324/photo-image-background-cloud-public-domainFree Image from public domain licenseCrocodylidae in SĂŁo Paulo Zoo. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3340672/free-photo-image-alligator-animal-cc0Free Image from public domain licenseGlacier cave at Pitztall in Austria. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3371551/free-photo-image-cave-cc0-creative-commonsFree Image from public domain licenseElizabeth Gray Otis (Mrs. Samuel Alleyne Otis), (ca. 1764) by John Singleton Copley. https://www.rawpixel.com/image/8230669/image-art-vintage-public-domainFree Image from public domain licenseHeadlight on a bicycle on a rainy day in the city. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3293786/free-photo-image-bicycle-bike-cc0Free Image from public domain licensePortrait of a Member of the Haarlem Civic Guard (ca. 1636–1638) by Frans Hal. https://www.rawpixel.com/image/8229859/image-art-vintage-public-domainFree Image from public domain licenseA close-up of the spinning surface of a vinyl record. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3303924/free-photo-image-camera-lens-cc0-creative-commonsFree Image from public domain licenseWilson Arch near La Sal in San Juan county, Utah, USA. (The author's description on the source web page incorrectly gives… https://www.rawpixel.com/image/3338627/free-photo-image-archaeology-cc0-cliffFree Image from public domain license