It took approximately 2.4 billion years for Earth's atmosphere to reach oxygen levels similar to what we see today. This increase in oxygen was primarily due to the photosynthetic activity of early cyanobacteria, which released oxygen as a byproduct.
Pangaea formed about 300 million years ago and began to rift about 200 million years ago.The formation and falling apart of super continents appears to be cyclical. Pangaea is the fourth super continent in Earth's history.Known super continents:Columbia (2 billion years to 1.8 billion years ago)Rodinia (1.1 billion years ago to 750 million years ago)Pannotia (600 million years ago to 540 million years ago)Pangea (300 million years ago to 200 million years ago)
The Cretaceous period occurred approximately 145 to 66 million years ago.
The Carboniferous period occurred approximately 300 to 360 million years ago.
There is no scientific evidence or indication that the Earth will explode within the next 1000 years. Natural events like volcanic eruptions or asteroid impacts are possible, but the Earth itself exploding is not a realistic scenario.
the saxons and vickings and kings --- Forest covered most of Britain 1000 years ago.
was it sad of fascinating
1000 years ago, the world was in what is now known as the Dark Ages. The Roman Empire has collapsed and Europe was under a rule known as feudalism.
If by 1000 years you mean about a billion years!
over 1000 years ago.
They like girls
1989 years ago
1000 years ago
The civilizations of Ancient Greece was at its peak nearly 1000 years ago
it was 1000 years ago
1000 years ago
1000