New Findings De-emphasize Oxygen's Role in Animal Evolution During Snowball Earth... скачать в хорошем качестве

New Findings De-emphasize Oxygen's Role in Animal Evolution During Snowball Earth...

New GSA Geology paper: Webb et al., 2025 - https://doi.org/10.1130/G53625.1 We used to think that the increase in oxygen levels on Earth around 700 million years ago drove the evolution of animals. However, geoscientists have since discovered that the story of oxygen on Earth and its relationship with animals is more complex than we once thought. In this video, Dr. Rachel Phillips (‪@GEOGIRL‬) summarizes the findings of a new #Geology paper (linked above) that presents Tl isotope records from before and during Earth's massive Snowball Earth events that suggest oxygen levels were fluctuating dramatically at this time. These new findings de-emphasize the role of oxygen as a major driver of animal evolution. Other references & resources: Animal evolution video:    • The Controversial Role of Oxygen in Animal...   Snowball Earth & the first animals video:    • Did Snowball Earth Force Animal Evolution?...   0:00 Oxygen through time 0:57 New Paper! 1:24 First animals on Earth 1:50 Studying ancient oxygen using isotopes 3:10 New Findings 4:33 Why didn’t animals evolve sooner? 5:22 An alternative hypothesis…