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66
Cretaceous Extinction Event
Mass extinction event by 10 KM asteroid impacting the Earth allowed for the rise of modern mammals in unique ecosystems and niches -
155
Age of the Dinosaurs
most prevalent large animals to ever wander pangea offer great diversity in shape and size and even take to air and sea. -
365
Tetrapods Invade the Land
Oceans are brimming with life and transition forms such as tiktaalik invade the land yet maintain fish characteristics as well -
635
Origin of Animals
protozoans and their predatory feeding leads to complexity and efficiency in organisms and their energy production -
Origin of Chloroplasts
Arises from symbiotic event and becomes specialized organelle -
The Great Appearance of Oxygen
2400-1400 O2 gas made by the cyanobacteria accumulates in atmosphere laying the foundation for the first critical element to support life for energy transformations -
Origin of Eukaryotes
1400-2000 Mitochondrion arises from symbiosis with bacteria triggering multicellular and increased complexity of organisms -
Visible Evidence for Life
stromatolite form as older generations are replaced by newer ones providing the earliest physical evidence of life on Earth -
Chemical Evidence of Life
early rock samples of organic compounds show low Carbon 13 indicating age is VERY old! -
Formation of Earth