Google has launched another experimental website, which you definitely want to visit and check out using your Chrome browser. Be it Humans, Animals, Water, Air or Places, the physical appearance of any matter on this Earth changes with Age. But have you ever thought if our dear planet “Earth” also changed with age since it was formed over 4.54 billion years ago by collisions in the giant disc-shaped cloud of material that also formed the Sun?
What Earth looked like millions of years ago
Yes, it’s true, the “Earth” that you see today and the “Earth” that existed millions of year ago is altogether different.
600 Million Years Ago: The First Signs of Life
After its birth, Earth had no oxygen, and therefore there were no traces of life.
Earth’s first date with life happened almost 600 Million years ago when multicellular life was just beginning to form in the oceans. Described as Ediacaran Period, the Earth at that time had barren land concentrated in one large landmass opposite to what you see today, i.e. split continents between oceans.
Below picture from Chrome Experiment shows you opposite faces of Earth where basically you either see a concentration of land or concentration of water.
So, this was the time when life was actually starting to develop in Oceans. First, plants evolved and moved onto land as they evolved roots. Animals followed after that in the form of giant insects and vertebrates.
540 Million years ago: The start
60 Million years later, at this period a mass extinction happened. The fossil record shows a dramatic expansion of animal life in the sea, known as the “Cambrian explosion.” This was the time when Animals were beginning to evolve shells and exoskeletons.
In the below picture, notice the disintegration of land.
400 Million years ago: Plants came to Earth
With life, came vegetation. Known as the Devonian Period, this was the time when life on land became more complex as plants started developing. Eventually, Insects diversified, and fish had fins, which eventually evolve into limbs. The first vertebrates walked on land. Oceans and coral reefs hosted a diverse range of fish, sharks, sea scorpions, and cephalopods.
220 Million years ago: Here come the Dinosaurs
This was a time when the biggest creature on Earth announced its arrival. Knows as Middle Triassic period, this period saw the emergence of small dinosaurs. Therapsids and archosaurs also emerged, along with the first flying invertebrates.
90 Million years ago: Modern mammals evolved
Known as the Cretaceous Period this time period is known for the evolvement of modern mammals, birds, and insects. This was the same time when most of the Western US was submerged under the ocean.
65 Million years ago: Extinction of biggest creature on Earth
Due to the catastrophic asteroid impact on the Yucatan Peninsula in Mexico, Earth lost its biggest animal, Dinosaur forever. It was not just the extinction of dinosaurs, but many marine reptiles, all flying reptiles, and many marine invertebrates and other species also vanished forever.
So here was what our planet “Earth” looked like over millions of years ago. If you would like to explore more about your planet go here.