The Antennae galaxies are shown in this composite image from the Chandra X-ray Observatory, the Hubble Space Telescope, and… https://www.rawpixel.com/image/441260/free-photo-image-galaxy-hubble-cosmosFree Image from public domain licenseRaven calling along the Firehole River. Original public domain image from Flickr https://www.rawpixel.com/image/4032690/photo-image-background-black-birdFree Image from public domain licenseRaven (Covus corax) perched on a Joshua tree (Yucca brevifolia) in Queen Valley https://www.rawpixel.com/image/8730642/photo-image-plant-public-domain-birdFree Image from public domain license