What is a broken foot? A broken foot is a condition characterized by a fracture of one of the 26 bones in your foot. The fracture may occur in your toes, ankle, heel or midfoot. A broken foot may result from a variety of injuries, including falls, accidents, or dropping an object on your foot. Osteoporosis, which is a thinning and weakening of the bones, is an additional cause of broken feet.
Period when the first true fish appeared - Crossword Clue. Below are possible answers for the crossword clue Period when the first true fish appeared. SILURIAN. from  425 million to 405 million years ago; first air-breathing animals.
Instead, scientists look to features of skeletons that are preserved in fossils such as three bones in the ear and a unique jaw joint. Ancestors of mammals first appeared on Earth during the early Jurassic period (195 million years ago) when dinosaurs like the Brachiosaurus, Stegosaurus, and Allosaurus lived. The fossil found belongs to Hadrocodium wuii, and was a tiny creature estimated to weigh two grams, which is less than a penny!