Do volcanoes or an asteroid deserve blame for dinosaur extinction? Asteroid/comet likely reignited Indian volcanoes 66 million years ago, but their role in extinction unclear — ScienceDaily

Scientists have obtained more precise dates for the Deccan Traps volcanic lava flows, linking peak activity more closely to the asteroid or comet impact 66 million years ago and the coincident mass extinction. But if greenhouse gases emitted before the impact created a hothouse climate that set life up for a fall when the impact cooled the planet, those gases did not coincide with the largest lava flows from the Deccan Traps.

Source: Do volcanoes or an asteroid deserve blame for dinosaur extinction? Asteroid/comet likely reignited Indian volcanoes 66 million years ago, but their role in extinction unclear — ScienceDaily

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Alessandro Magnasco (Attr.) and Clemente Spera Attr.) - Landscape with classical ruins and figures

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Co-evolution: How does the need to sync development affect a system’s complexity? 

We are told that little is known about co-evolution and symbiosis, which prompts a question: How does the requirement for synchronization affect the overall complexity of the system?

Source: Co-evolution: How does the need to sync development affect a system’s complexity? | Uncommon Descent