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Protein Domain is a conserved part of a given protein sequence and (tertiary) structure that can evolve, function, and exist independently of the rest of the protein chain. Prior to the Cambrian explosion, most organisms were simple, composed of individual cells occasionally organized into colonies.
Over the following 70 to 80 million years, the rate of diversification accelerated by an order of magnitude and the diversity of life began to resemble that of today.
The photo above is not to make you feel insignificant, it is only for reference and scale. Depending on your field of view, you would have to be around 100,000 light years away to see this Galaxy using the naked human eye.
And as you got closer, it would almost disappear because of the tremendous amount of space there is between everything, like with atoms.
Shannon Sharpe says it might be the beginning of the end for the Patriots dynasty ...
'cause recent statements by Robert Kraft prove there are real problems between him, Bill Belichick and Tom Brady.
Land plants began to diversify in the Late Silurian, from around 430 million years ago, and the results of their diversification are displayed in remarkable detail in an early Devonian fossil assemblage from the Rhynie chert.
The Scale of the Universe from Big to Small (youtube) The Scale of the Universe from Small to Big (youtube) NASA Astronomy Picture of the Day (APOD) The Scale of the Universe - Interactive (manual control scale) Sizes (nano) It is believed that our Universe began.
(Not sure if it was the first time or even the beginning of time? Reionization marks the point at which the hydrogen in the Universe became ionized.
Ions can be created, by either chemical or physical means, via ionization. Theia collided with another planetary-mass object, Gaia (the early Earth) around 4.51 billion years ago.
Shape of the Universe - Photo GN-z11 high-redshift galaxy found in the constellation Ursa Major, and is currently the oldest and most distant known galaxy in the observable universe - 13.4 billion years old. That was when the Moon Formed, the Moon was twice as close then it is now causing 10,000 ft. Age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). Oxygen is what makes the sky blue, molecules in the air scatter blue light from the sun more than they scatter red light.
Records of the appearance and disappearance of particular taxa at a single locality are insufficient to define a bioevent.