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Feathered dinosaurs
The realization that
dinosaurs are closely
related to birds raised the
obvious possibility that
some dinosaurs had feathers.
Fossils of Archaeopteryx
include well-preserved
feathers, but it was not
... > full story
Evolution of the horse
The evolution in the
structure of their teeth,
odd-toed limbs, obvious
mobility of the upper lip,
and other aspects, joins the
horse to the evolutionary
line of odd-toed, hoofed
mammals: the Perissodactyls.
... > full story
Trace fossil
Trace fossils are those
details preserved in rocks
that are indirect evidence
of life. While we are most
familiar with relatively
spectacular fossil hard part
remains such as shells and
bones, trace fossils are
... > full story
Cretaceous
The Cretaceous period is one
of the major divisions of
the geologic timescale,
reaching from the end of the
Jurassic period, about 146
million years ago (Ma), to
the beginning of the
Paleocene epoch of the
... > full story
Browse Reference Articles
1 to 10 of 147 articles
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Multiregional hypothesis
The multiregional origin hypothesis of human species holds that some, or all, of the genetic variation between the contemporary human races is attributable to genetic inheritance from either Homo ... > more -
Paralititan
Paralititan stromeri was a giant titanosaurian sauropod dinosaur discovered in coastal deposits in the Upper Cretaceous Bahariya Formation of Egypt. The fossil represents the first tetrapod reported ... > more -
Extinction event
An extinction event (also extinction-level event, ELE) occurs when a large number of species die out in a relatively short period of time. Since life began on Earth, a number of major mass ... > more -
Homo ergaster
Homo ergaster ("working man") is an extinct hominid species (or subspecies, according to some authorities) which lived throughout eastern and southern Africa between 1.9 to 1.4 million years ago with ... > more -
Parallel evolution
Parallel evolution is the independent evolution of similar traits, starting from a similar ancestral condition. Frequently this is the situation in more closely related lineages, where several ... > more -
Hominid intelligence
The nature and origins of hominid intelligence is a much-studied and much-debated topic, of natural interest to humans as the most successful and intelligent hominid species. There is no universally ... > more -
Peking Man
Peking Man (sometimes now called Beijing Man), also called Sinanthropus pekinensis (currently Homo erectus pekinensis), is an example of Homo erectus. The remains were first discovered in 1923-27 ... > more -
Excavation
Excavation is the best-known and most commonly used technique within the science of archaeology. Individual excavations are normally referred to simply as "digs" by those who participate, this being ... > more -
Hadrosaurus
Hadrosaurus is a hadrosaurid dinosaur genus. In 1858, a skeleton of a dinosaur from this genus was the first full dinosaur skeleton found in North America, and in 1868 it became the first ever ... > more
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