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A turtle shell is a bio-composite consisting of a keratin-coated dorsal shell, or carapace, and a flat interior made of cancellous bone sandwiched between thin layers of cortical bone. The flat, bony configuration allows for significant weight reduction, thereby resulting in higher stiffness, strength, and toughness-to-weight ratios.
A Greek tortoise shell opened to show the skeleton from below Main article: Turtle shell The carapace is the dorsal (back) convex part of the shell structure of a turtle , consisting primarily of the animal's rib cage, dermal armor, and scutes .
The shells of cyamodontoids differ from those of turtles in several ways. Turtle shells are fused to their skeletons in several regions, including the vertebrae, ribs, gastralia (belly ribs), and pectoral girdles, but cyamodontoid shells overlie skeletal bones without any fusion. Turtle shells are also composed of two layers of osteoderms ...
The Mark III helmet was designed to provide better protection for the side of the head than its predecessor. It was a deeper helmet with a smaller brim and provided 38% more protection than the Mark II, particularly at the sides (total area of head protection was increased by 12%, horizontal protection was increased by 15% and from items falling from overhead by 11%).
The turtle shell is a shield for the ventral and dorsal parts of turtles (the order Testudines), completely enclosing all the vital organs of the turtle and in some cases even the head. [1] It is constructed of modified bony elements such as the ribs, parts of the pelvis and other bones found in most reptiles.
The earliest archaeological evidence of armor in China dates to the Shang dynasty. These were either breastplates made of shell tied together or a one-piece rawhide or [partially tanned] leather breastplate. [1] Helmets were made of bronze and often sported elaborate designs consisting of animal motifs.
Winter is finally here, and bears are getting ready to find a den to hibernate in over the next few months. In Wyoming's Yellowstone National Park, one bear was caught prepping for his long sleep ...
Minecraft: An ancient fireproof alloy made from gold and netherite scraps, which are smelted from debris found in the Nether dimension. When combined with diamond equipment, the metal creates the game's strongest weapons and armor. [53] [54] Nth Metal DC Comics: A Thanagarian alloy used by Hawkman and Hawkwoman. [55]