Radiocarbon dating calibration involves
Marine Biology , in the late Proterozoic, oxygen levels in the oceans and atmosphere increased dramatically.By 600 million years ago, the oxygen in the atmosphere reached about one-fifth of today’s level (21 percent).- Galaxies - Space - Black Holes - Earth - Planets - Moon - Stars - Sun - Solar System Magnetics - Gravity Extra Terrestrial - ET - Space Aliens - Probes Space Station - Space Shuttle - Space Travel Satellites - Asteroids - Telescopes Time Measuring Pyramid of Complexity Science - Physics The photo on the right is not a Selfie.It is just an Artist rendition of what our galaxy would look like from another galaxy.
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.
Pangaea started braking apart about 200 million years ago.
G Plates Earth Byte India broke away from the other fragments of Gondwana and began moving north.
Cretaceous–Paleogene Extinction Event is also known as the Cretaceous–Tertiary (K–T) extinction, was a mass extinction of some three-quarters of the plant and animal species on Earth that occurred over a geologically short period of time approximately 66 million years ago.
With the exception of some ectothermic species like the leatherback sea turtle and crocodiles, no tetrapods weighing more than 25 kilograms (55 lb) survived.
Gondwana is the name given to an ancient supercontinent.