Amphibians have been evolving for nearly 400 million years, the first ever discovered fossil of theirs dating back 368 million years during the late-Devonian period. Since then, they have evolved into about 8,600 different species and subspecies currently recognized by science, with more and more ...
In many instances the original, organic remains of an organism are destroyed by natural processes over long periods of time. Sometimes, if the remains became encased within rock, a hole can be left in the shape of that organism. This type of fossil is called an external mold. If the hole...
A type of organism that no longer exist Extinct The law of ___ states that sedimentary rock layers is older layer above it Superposition What type of fossil provides clues about the behaviors or activities of ancient organism Perminegised What type of fossil is formed when minerals replace all...
Carbon Dating Due to the presence of carbon-14, carbon film fossils are relatively easy for scientists to date. Plants absorb carbon-14 from the air, and animals consume it when they eat plant life. At the moment of a plant or animal's death, the carbon-14 begins to decay. The half-...
The giant panda has long been the national animal of China. It is considered a “living fossil,” and its distinctive large, black-and-white appearance and benevolent behavior make it beloved among humans. Where to Find the Top Wild Animals Snow leopards are adapted for life in cold habitats...
Productus subaculeatusis a Carboniferous brachiopod known for its large shell and numerous spines. It's a valuable index fossil for dating rocks. Brachiopods are marine invertebrates with hard shells, resembling clams but structurally different. They have existed since the Cambrian Period (~540 million...
The extensivefossil recordof genera and species is testimony that dinosaurs werediverseanimals, with widely varying lifestyles andadaptations. Their remains are found insedimentary rocklayers (strata) dating to the Late Triassic Epoch (approximately 237 million to 201.3 million years ago). The abundance...
Allosaurus is the official state fossil of Utah because of the abundant number of fossils found in the state. Allosaurus Differnt Lizard” or Allosaurus weighed around two tonnes that is almost equal to a car. Alpine Goat Alpine goats are the most common type of goat used for milk, cheese,...
These fossil reefs were substantial structures, up to 50 m thick, but their developmental history was obscured by imprecise dating, and it was unclear if the transition between reef types occurred during a single episode of reef accretion14. Although the Huon data seemed to confirm that the ...
Not much else is known about megapiranha, and the only fossil record (known as a holotype) is its jaw bones with three teeth still in their zigzag row pattern. Based on those fossilized remains, archeologists estimate that megapiranha grew over 2 feet long and weighed up to 22 pounds, an...