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We watch documentaries and read a plethora of materials on the history of animal and plant species every single day. But how did humans discover the origins of these animals and plant species? It was with the help of fossils. Paleontologists have been able to harness vital information from fossils to give us clues to what environment , ecosystems and living things were thousands of years ago.
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Mysterious spherical fossils could be oldest known animals

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Frequently Asked Questions - National Fossil Day (U.S. National Park Service)

Trilobite , any member of a group of extinct fossil arthropods easily recognized by their distinctive three-lobed, three-segmented form. Trilobites, exclusively marine animals, first appeared at the beginning of the Cambrian Period , about million years ago, when they dominated the seas. Although they became less abundant in succeeding geologic periods, a few forms persisted into the Permian Period , which ended about million years ago. Because trilobites appear fully developed in the Cambrian Period, it appears likely that the ancestral trilobites originated during the Ediacaran Period million to million years ago of Precambrian times. An organism that may be ancestral to the trilobites, as well as to other arthropods, may be represented by Spriggina , which is known from Precambrian shallow-water marine deposits in Australia.
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Frequently Asked Questions

January 25, Paleontologists picking through a bounty of fossils from Montana have discovered something unexpected—a new species of lizard from the late dinosaur era, whose closest relatives roamed in faraway Asia. This ancient lizard, which lived 75 million years ago in a dinosaur nesting site, is described from stem to stern in a paper published Jan. Right out of the gate, Magnuviator is reshaping how scientists view lizards, their biodiversity and their role in complex ecosystems during this reptile's carefree days in the Cretaceous Period 75 million years ago.
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Fossils are the mineralized or otherwise preserved remains or traces such as footprints of animals, plants, and other organisms. The totality of fossils and their placement in fossiliferous fossil-containing rock formations and sedimentary layers strata is known as the fossil record. The study of fossils across geological time, how they were formed, and the evolutionary relationships between taxa phylogeny are some of the most important functions of the science of paleontology. While most fossils are several thousands to several billions of years old, there is no minimum age for a fossil. A fossil normally preserves only a portion of the deceased organism, usually that portion that was partially mineralized during life, such as the bones and teeth of vertebrates, or the chitinous exoskeletons of invertebrates.
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