4 ms·
That would be funny! It would mean they emerged right after the Huronian icehouse period ended, in the same way the Cambrian Explosion happened right after the
by lainga 2y ago
That would be funny! It would mean they emerged right after the Huronian icehouse period ended, in the same way the Cambrian Explosion happened right after the Cryogenian period ended.
[] https://en.wikipedia.org/wiki/Greenhouse_and_icehouse_Earth https://en.wikipedia.org/wiki/Greenhouse_and_icehouse_Earth
- Qem 2y agoIIRC this was associated to an early, brief spike in atmospheric oxygen. It went up, fell, and then took about one gigayear to increase again to large sustained levels closer to what we have today. Large organisms have low area to volume ratios, and require a high level of oxygen to scale up while producing enough energy. See https://ars.els-cdn.com/content/image/1-s2.0-S1674987112000898-gr1.jpg https://ars.els-cdn.com/content/image/1-s2.0-S16749871120008... Source: https://www.sciencedirect.com/science/article/pii/S1674987112000898 https://www.sciencedirect.com/science/article/pii/S167498711...
- frutiger 2y ago> while producing enough energy “while transforming enough energy” is both more accurate but also educates the lay reader by hinting at the processes involved.