(1) Species vary globally. (2) Species vary locally. (3) Species vary over time.
Charles Darwin studied many different species throughout his life. During the 5 year journey on the beagle in 1831, Darwin collected and catologed many different species from the galopogus islands. The most famous species that he collected and lead him to his theory were the finches.
Charles Darwin observed a wide variety of plant and animal species during his travels, noting how they adapted to their environments over time. This observation led to his theory of evolution by natural selection, which revolutionized our understanding of how species evolve.
Darwin collected enormous numbers of fossils and specimens of extant species, and made thousands of observations of changes. His observations clearly documented that species undergo change over time. Since Darwin's time we have gathered much more data about the processes of evolutionary change, such that the theory of evolution is now considered the foundational concept of modern biology.
Charles Darwin is credited with discovering the origin of species through his work in the field of evolution and natural selection. His book "On the Origin of Species" was published in 1859 and revolutionized the way we understand the diversity of life on Earth.
(1) Species vary globally. (2) Species vary locally. (3) Species vary over time.
Charles Darwin studied many different species throughout his life. During the 5 year journey on the beagle in 1831, Darwin collected and catologed many different species from the galopogus islands. The most famous species that he collected and lead him to his theory were the finches.
Charles Darwin observed a wide variety of plant and animal species during his travels, noting how they adapted to their environments over time. This observation led to his theory of evolution by natural selection, which revolutionized our understanding of how species evolve.
If there was no change in species over time, then all fossils of that species would be identical.
Darwin collected enormous numbers of fossils and specimens of extant species, and made thousands of observations of changes. His observations clearly documented that species undergo change over time. Since Darwin's time we have gathered much more data about the processes of evolutionary change, such that the theory of evolution is now considered the foundational concept of modern biology.
Fossils provide valuable evidence of how organisms have evolved over time. By studying the structure, shape, and characteristics of fossils, scientists can observe unique features that have changed or stayed the same. Fossils also help in understanding the transition from one species to another and provide a record of extinct species, giving insights into the diversity of past ecosystems and the evolutionary journey of life on Earth.
Modern animals may be related to fossilized organisms.
Fossils' existence confirms that species are not fixed but can evolve into other species over time
Fossils are used to show changes because they are permanent. These fossils are also old and show evolutionary changes in species alive today.
more than 6,000 years old
new layer of the fossils
Certainly fossilized parts of dinosaurs had been found for centuries but people didn't know exactly what they were. They were mistaken for all sorts of animals. I think it was Othniel Charles Marsh in the mid-to-late 19th century who first systematically collected dinosaur fossils and assembled them so that it became clear what they were and how they were related.