At the cosmic origin, a trillion years ago, all that existed was an endless Light Ocean. Inexhaustible was this frozen supply of light available for black holes to continually build spheres and solar systems in galaxies.
After over a century of debate over the age of the Universe, including a period of decades where many argued that the Universe was infinitely old, we finally know its age: 13.8 billion years.
Our Milky Way will have lost its identity long ago through merging with the Andromeda galaxy, M31. The resulting giant elliptical galaxy will be devoid of dust and gas. The night sky will be a largely homogeneous sprinkling of stars. Stellar density will concentrate toward the galactic core.
About 13.8 billion years ago, the Big Bang gave rise to everything, everywhere, and everywhen—the entire known Universe.
The Big Bang was the earliest known event in the universe. We can trace the history of our universe back about 14 billion years, to a fiery period known as the Big Bang. At that time, the universe was extremely hot and dense.
Primitive life existed on earth over 2 billion years ago, researchers say | Euronews.
Fossil evidence
Some computer models suggest life began as early as 4.5 billion years ago. 3.465-billion-year-old Australian Apex chert rocks may once have contained microorganisms, the earliest fossil evidence of life on Earth.
In this eon, Earth's atmosphere was mostly methane and nitrogen. The only life forms that could exist were anaerobic cyanobacteria (blue-green algae). In the absence of oxygen, these microscopic cyanobacteria converted sunlight to energy. They carried out photosynthesis in the oceans metabolizing their own food.
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
Astronomers have discovered what may be the oldest and most distant galaxy ever observed. The galaxy, called HD1, dates from a bit more than 300 million years after the Big Bang that marked the origin of the universe some 13.8 billion years ago, researchers said on Thursday.
By 1014 (100 trillion) years from now, star formation will end. This period, known as the "Degenerate Era", will last until the degenerate remnants finally decay. The least-massive stars take the longest to exhaust their hydrogen fuel (see stellar evolution).
Our Milky Way galaxy is destined to collide with our closest large neighbour, the Andromeda galaxy, in about five billion years. Scientists can predict what's going to happen. The merger will totally alter the night sky over Earth but will likely leave the solar system unharmed, according to NASA.
Trillions of years in the future, long after Earth is destroyed, the universe will drift apart until galaxy and star formation ceases. Slowly, stars will fizzle out, turning night skies black. All lingering matter will be gobbled up by black holes until there's nothing left.
At the most wildly optimistic estimate, our species will last perhaps another billion years but end when the expanding envelope of the sun swells outward and heats the planet to a Venus-like state. But a billion years is a long time. One billion years ago life on Earth consisted of microbes.
If you asked us for the immediate response to the question: what comes after a trillion, it would be quadrillion. As you can see, that number comes exactly after a trillion. We can define a quadrillion as 1 with 15 zeros after it. It can written as 1,000,000,000,000,000.
The trite answer is that both space and time were created at the big bang about 14 billion years ago, so there is nothing beyond the universe. However, much of the universe exists beyond the observable universe, which is maybe about 90 billion light years across.
Adam is the name given in Genesis 1-5 to the first human. Beyond its use as the name of the first man, adam is also used in the Bible as a pronoun, individually as "a human" and in a collective sense as "mankind".
Researchers have announced the naming of a newly discovered species of human ancestor, Homo bodoensis. The species lived in Africa about 500,000 years ago, during the Middle Pleistocene age, and was the direct ancestor of modern humans, according to scientists.
The earliest time of the Earth is called the Hadean and refers to a period of time for which we have no rock record, and the Archean followed, which corresponds to the ages of the oldest known rocks on earth. These, with the Proterozoic Eon are called the Precambrian Eon.
Instead, it consisted mainly of carbon dioxide, perhaps as much as 100 times more carbon dioxide than contained in today's atmosphere. During this time, Earth's only life forms were aquatic, one-celled organisms—primitive forms of bacteria—that extracted energy from a variety of sources.
1.5 billion-year-old Earth had water everywhere, but not one continent, study suggests. Chemicals in rocks hinted at a world without continents. What did Earth look like 3.2 billion years ago? New evidence suggests the planet was covered by a vast ocean and had no continents at all.
Early humans first migrated out of Africa into Asia probably between 2 million and 1.8 million years ago. They entered Europe somewhat later, between 1.5 million and 1 million years. Species of modern humans populated many parts of the world much later.
Almost all life on Earth was wiped out 2 billion years ago, a new study says. The most catastrophic wipe-out on Earth didn't happen to the dinosaurs. A new study found extreme changes in the atmosphere killed almost 100% of life on Earth about 2 billion years ago.
A comb jelly. The evolutionary history of the comb jelly has revealed surprising clues about Earth's first animal.
Bones of primitive Homo sapiens first appear 300,000 years ago in Africa, with brains as large or larger than ours. They're followed by anatomically modern Homo sapiens at least 200,000 years ago, and brain shape became essentially modern by at least 100,000 years ago.