BBC Nature - History of life on Earth Beginning of the Universe - Beginning of Time Dinesh D'Souza, debate at Tufts University (2007). Used by permission. Nothing we observe today existed prior to that exact moment. Further, it was something outside of time, outside of space, and outside of matter that caused all of this to come into existence. The realization that our universe started, and did not always exist, brings enormous challenges to nontheistic scientists. Are scientists certain of this Big Bang Theory? In this point of origin, all the mass in the universe was compressed into a single point of infinite density...smaller than a single atom.2 Then in a cosmic explosion--the Big Bang--the universe came into being. This eerily parallels the record, "In the beginning, God created the heavens and the earth...and God said, 'Let there be light,' and there was light."4 It came about not from matter, but from pronouncement. Instead, could our universe have come about through the laws of physics: such as gravity, electromagnetism, speed of light, etc.?
The Universe This picture shows the overall structure of our universe. This is just a small piece, but it is enough to see that matter is organized in strands, or strings. Lets start from the beginning. The Earth revolves around the Sun. The Sun in turn revolves or circles the center of the galaxy. Our galaxy is part of a group of galaxies called the Local Group. Now here is where it gets fun. Millions of galaxy clusters around the universe are strung together like a spiderweb. If you could look at the entire universe at once it would look like a giant spiderweb, made up of billions of galaxies, and trillions and trillions of stars.
What Happened Before the Beginning? Every cosmologist and astronomer agrees: our Universe is 13.7 billion years old. Using cutting-edge technology, scientists are now able to take a snapshot of the Universe a mere heartbeat after its birth. Armed with hypersensitive satellites, astronomers look back in time to the very moment of creation, when all the matter in the Universe exploded into existence. It is here that we uncover an unsolved mystery as old as time itself - if the Universe was born, where did it come from? The big bang theory holds that the entire universe was once packed tightly into an unimaginably dense and tiny space, known as a "singularity." But what brought about that big bang? Successfully answering the question of what existed before the big bang would require bridging the gap between the so-far mutually incompatible worlds of relativism and quantum mechanics. This is the fourth episode. Watch the full documentary now
Fossil of ancient multicellular life sets evolutionary timeline back 60 million years -- ScienceDaily A Virginia Tech geobiologist with collaborators from the Chinese Academy of Sciences have found evidence in the fossil record that complex multicellularity appeared in living things about 600 million years ago -- nearly 60 million years before skeletal animals appeared during a huge growth spurt of new life on Earth known as the Cambrian Explosion. The discovery published online Wednesday in the journal Nature contradicts several longstanding interpretations of multicellular fossils from at least 600 million years ago. "This opens up a new door for us to shine some light on the timing and evolutionary steps that were taken by multicellular organisms that would eventually go on to dominate the Earth in a very visible way," said Shuhai Xiao, a professor of geobiology in the Virginia Tech College of Science. The discovery sheds light on how and when solo cells began to cooperate with other cells to make a single, cohesive life form.
What are scientific theories of creation? I don't know that you can put the Biblical account of Creation into a framework that would be acceptable to empirical testing and observations used in modern science...it was a super-natural event beyond the means to be tested just as the conditions prior to the Big Bang are unobservable and defy all known laws of physics.. All one can do is observe the evidences and see what they are most consistent with...special Creation or naturalistic, evolutionary origins....and they seem to point to special Creation. According to the Bible, God "spoke" all things into existence around 6000 years ago and a scientific case can be made that there are many evidences which agree with that if one removes naturalistic assumptions which guides much of modern science.
History of Earth Artistic concept of the primordial Earth when it was much hotter and hostile to life The history of Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe. An immense amount of biological and geological change has occurred in that time span. The first life forms appeared between 3.8 and 3.5 billion years ago. Geological change has been constantly occurring on Earth since the time of its formation and biological change since the first appearance of life. Earth's history with lengths of the eons to scale Geologic time scale The history of the Earth is organized chronologically in a table known as the geologic time scale, which is split into intervals based on stratigraphic analysis. A full-time scale can be found at the main article. Millions of Years
Did a hyper-black hole spawn the Universe? The event horizon of a black hole — the point of no return for anything that falls in — is a spherical surface. In a higher-dimensional universe, a black hole could have a three-dimensional event horizon, which could spawn a whole new universe as it forms. It could be time to bid the Big Bang bye-bye. Cosmologists have speculated that the Universe formed from the debris ejected when a four-dimensional star collapsed into a black hole — a scenario that would help to explain why the cosmos seems to be so uniform in all directions. The standard Big Bang model tells us that the Universe exploded out of an infinitely dense point, or singularity. But nobody knows what would have triggered this outburst: the known laws of physics cannot tell us what happened at that moment. “For all physicists know, dragons could have come flying out of the singularity,” says Niayesh Afshordi, an astrophysicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada. On the brane Model discrepancy
Timeline: The evolution of life By Michael Marshall There are all sorts of ways to reconstruct the history of life on Earth. Pinning down when specific events occurred is often tricky, though. For this, biologists depend mainly on dating the rocks in which fossils are found, and by looking at the “molecular clocks” in the DNA of living organisms. There are problems with each of these methods. Modern genetics allows scientists to measure how different species are from each other at a molecular level, and thus to estimate how much time has passed since a single lineage split into different species. These difficulties mean that the dates in the timeline should be taken as approximate. 3.8 billion years ago? This is our current “best guess” for the beginning of life on Earth. At some point far back in time, a common ancestor gave rise to two main groups of life: bacteria and archaea. How this happened, when, and in what order the different groups split, is still uncertain. 3.5 billion years ago 3.46 billion years ago
The Nature of Science and of Theories on Origins The Nature of Science and of Scientific Theories Science is our attempt to observe, understand, and explain the operation of the universe and of the living things it contains. Since a scientific theory, by definition, must be testable by repeatable observations and must be capable of being falsified if indeed it were false, a scientific theory can only attempt to explain processes and events that are presently occurring repeatedly within our observations. Theories about history, although interesting and often fruitful, are not scientific theories, even though they may be related to other theories which do fulfill the criteria of a scientific theory. The Nature of Theories on Origins On the other hand, the theory of creation and the theory of evolution are attempts to explain the origin of the universe and of its inhabitants. Thus the notion that evolution is a scientific theory while creation is nothing more than religious mysticism is blatantly false. . . . References 1.
How Was The Earth Created? Hello Earth - Origins of Our Planet Where did the Earth come from? This is an important question. A question that helps us understand our own origin as a race of sentient, thinking beings. Did the Earth always exist? These are difficult questions to answer. Big Bang According to the Big Bang model, the universe expanded from an extremely dense and hot state and continues to expand today. The graphic scheme above is an artist's concept illustrating the expansion of a portion of a flat universe. The Big Bang is the scientific theory that is most consistent with observations of the past and present states of the universe, and it is widely accepted within the scientific community. It offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and the Hubble diagram. The core ideas of the Big Bang—the expansion, the early hot state, the formation of light elements, and the formation of galaxies—are derived from these and other observations. As the distance between galaxies increases today, in the past galaxies were closer together. Overview Timeline of the Big Bang The earliest phases of the Big Bang are subject to much speculation.