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[4] [5] Charles Darwin more famously proposed the theory of universal common descent through an evolutionary process in his book On the Origin of Species in 1859: "Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth have descended from some one primordial form, into which life was first ...
Evolutionary theory predicted that since amphibians evolved from fish, an intermediate form should be found in rock dated between 365 and 385 million years ago. Such an intermediate form should have many fish-like characteristics, conserved from 385 million years ago or more, but also have many amphibian characteristics as well.
These animals are called "secondarily aquatic" because although their ancestors lived on land for hundreds of millions of years, they all originally descended from aquatic animals (see Evolution of tetrapods). These ancestral tetrapods had never left the water, and were thus primarily aquatic, like modern fishes.
Common descent is a concept in evolutionary biology applicable when one species is the ancestor of two or more species later in time. According to modern evolutionary biology, all living beings could be descendants of a unique ancestor commonly referred to as the last universal common ancestor (LUCA) of all life on Earth.
As a child, Dixon was inspired by H. G. Wells' The Time Machine, particularly the far future creatures featured in the book, to create his own imaginary future animals descended from creatures of the modern day. These animals often served as background characters in Dixon's own retellings of Wells' work.
However, on land, plants come to dominate and transform the ecosystem, and animals soon follow. In live-action segments, a rainbow nudibranch preys on a sea anemone , larval jellyfish attempt to float over predatory sea anemones, a bobtail squid hunts a shrimp , male giant cuttlefish fight over mates, male sarcastic fringeheads fight over ...
This episode goes through how the vertebrates evolved and came onto land. It details the origins of the vertebrates, which lie in the primitive fish that once swam in ancient seas. Remarkable advances allowed them to make the radical move onto land, and then take to the skies with the advent of flight.
The Future Is Wild (also referred to by the acronym FIW) [1] is a 2002 speculative evolution docufiction miniseries and an accompanying multimedia entertainment franchise. The Future Is Wild explores the ecosystems and wildlife of three future time periods: 5, 100, and 200 million years in the future, in the format of a nature documentary.