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The trackway Protichnites from the Cambrian, Blackberry Hill, central Wisconsin. A trace fossil, also known as an ichnofossil (/ ˈ ɪ k n oʊ f ɒ s ɪ l /; from Greek: ἴχνος ikhnos "trace, track"), is a fossil record of biological activity by lifeforms but not the preserved remains of the organism itself. [1]
The earliest known animals are cnidarians from about , but these are so modern-looking that they must be descendants of earlier animals. [92] Early fossils of animals are rare because they had not developed mineralised , easily fossilized hard parts until about 548 million years ago . [ 93 ]
Small bones of small theropods that were preyed upon by larger ones may have been swallowed whole and digested frequently enough to affect their abundance in the fossil record. [9] In 2001, Bruce Rothschild and others published a study examining evidence for stress fractures in theropod dinosaurs and the implications for their behavior. [10]
Prehistoric flying reptiles lived on a diet of small fish and squid, the latest scientific research has shown. Researcher Dr Roy Smith said stomach contents discovered in fossils were the "smoking ...
Approximately 6,000 years ago, prehistoric humans living in southern China were among the first people to eat cooked food. Now, fossils unearthed in the Zuojiang River Basin in the Guangxi region ...
The study of animal remains in archaeology teaches how humans and animals interacted with one another in prehistoric times. This gives an insight on how humans began domesticating animals. In zooarchaeology, studies will show the animal and human husbandry, as well as the process of cultures adding animals into their diets. [12]
An amateur fossil hunter found a mammoth tusk in a Mississippi creek.. Experts said it was the first mammoth tusk found in the state. Mammoth tusks can offer unique insight into their lives ...
Ten species of fossil dinosaurs from five taxonomic groups reveal indices even higher than in mammals, when body size is accounted for, indicating that they were highly active, aerobic animals. Thus high blood flow rate, high blood pressure, a four-chambered heart and sustained aerobic metabolism are all consistent with endothermy.