PIX4661605: Mistastin Crater - Canada - Mistastin Impact Crater - Canada - Mistastin Impact Crater seen since the Space Shuttle Challenger in 1985. The Mistastin Crater is a meteoritic crater located in Canada in the Labrador region and contains circular lake Mistastin. Mistastin crater is a meteorite crater in Labrador, Canada which contains the roughly circular Mistastin Lake / Bridgeman Images
PIX4661665: Dimetrodons by a lake - Dimetrodon lakeside - View of an artist of dimetrodons in a Permian landscape. Dimetrodon is a mammalian reptile (Therapside), carnivore living in Permian. A pair of carnivorous Dimetrodon explores an Early Permian landscape. The tree on the left is a Corodite, an ancient ancestor of today's conifers, and on the far right is a Glossopteris, a seed plant that came to dominate this period with over 70 different species / Bridgeman Images
PIX4661669: Dunkleosteus and Cladoselache - Dunkleosteus & Cladoselache - A Dunkleosteus approaches a Cladoselache, the ancestor of sharks. Dunkleosteus, formerly called Dinichthys, is a large fossil placoderm. He lived in the Upper Devonian, between 415 and 360 million years. The largest representatives of the genus were approximately 8-10 m long and weighed around 5 tonnes. These fish were probably the greatest marine predators of their time. A 30-foot-long, four-ton hypercarnivorous apex predator of the species Dunkleosteus terrellix is about to make a meal of a six-foot-long primitive shark of the genus Cladoselache 370 million years ago in the Rheic Ocean near what is today North America. Dunkleosteus terrellix was one of the largest arthrodire placoderms ever to have lived. Almost as long as a school bus, It was heavily armored and therefore likely a relatively slow, but powerful swimmer. There are four Cladoselache/primitive sharks in this image. The schooling fish are generic representatives of the class Actinopterygii, a sub-class of the bony fishes which emerged about 420 million years ago, while the sea jellies are generic representatives of the subphylum Medusozoa / Bridgeman Images
PIX4661737: Lycaenops - Lycaenops is a genus of Gorgonopsian, that is, a therapside (mammalian reptile) that lived 270 million years ago, during the second part of Permian. Its name comes from the Greek and means “wolf face”. It was about 1 metre long. A three-foot-long, 35 pound carnivorous therapsid (mammal-like reptile) of the genus Lycaenops wanders a mountainous Mid-Permian landscape 270 million years ago in what is today South Africa. Vegetation includes various ferns forming ground cover and a large cycad. While reptilian in origin, Lycaenops more resembled a modern wolf with a long and slender skull, wolf-like fangs, and long legs held close to its body which probably enabled it to out-run the small reptiles and dicynodonts it dined on / Bridgeman Images
PIX4661943: Allosaurus among the sequoias - Allosaurus amidst Sequoias - A couple of allosaurus (allosaurus, carnivorous dinosaur) foraging in the middle of a sequoia forest. The adult male allosaur is recognizable with its orange “” horns””. For 5 million years, allosaurs were the most frequent carnivores in North America. A pair of Allosauruses search for dinner in the pre-twilight of a lush mountainside forest. The orange “” horns”” on the foreground Allosaurus identifies this as an adult male, while his female companion behind attempts to make a meal of an unfortunate terrapin. 150 million years ago during the late Jurassic period, giant Sequoias - also known as Redwoods - may have populated all of the northern continents. These evergreens grow as tall as 370 feet and some have trunk diameters exceeding 25 feet. The only living Sequoias today - and some are over 2,000 years old - occupy a narrow strip of land along the North American Pacific coast. Also during the late Jurassic, a large, carnivorous dinosaur known as Allosaurus is likely to have hunted in the shade of the first Sequoias. For 5 million years Allosaurus was the most common large carnivore in North America. Growing as long as 40 feet and weighing up to two tons, this fierce predator probably had few, if any rivals / Bridgeman Images
IMB4834516: Roman Art: “” the Mouth of the Verite”” (Bocca della Verita) Marble Mask uses as a sewer mouth of the Cloaca Maxima (Cloaca Massima or Cloaque Maxime) representing the mythological god Ocean.. 1st century AD. Church of St. Mary in Cosmedin (Santa Maria in Cosmedin), Rome / Bridgeman Images