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ScienceDaily: Fossils & Ruins News |
| Extinction and origination patterns change after mass extinctions Posted: 06 Oct 2021 11:34 AM PDT A sweeping analysis of marine fossils from most of the past half-billion years shows the usual rules of body size evolution change during mass extinctions and their recoveries. The discovery is an early step toward predicting how evolution will play out on the other side of the current extinction crisis. |
| Earth’s ‘solid’ inner core may contain both mushy and hard iron Posted: 06 Oct 2021 08:27 AM PDT New research suggests that Earth's 'solid' inner core is, in fact, endowed with a range of liquid, soft, and hard structures which vary across the top 150 miles of the inner core. |
| Early human activities impacted Earth’s atmosphere more than previously known Posted: 06 Oct 2021 08:26 AM PDT An international team of scientists used data from Antarctic ice cores to trace a 700-year old increase in black carbon to an unlikely source: ancient Maori land-burning practices in New Zealand, conducted at a scale that impacted the atmosphere across much of the Southern Hemisphere and dwarfed other preindustrial emissions in the region during the past 2,000 years. Their results make it clear that human activities have impacted Earth's atmosphere and climate earlier and at larger scales than previously known. |
| The role of diet in the rise of modern shark communities Posted: 06 Oct 2021 07:44 AM PDT The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, in which over 3,000 shark teeth were analyzed, provides new insight into how modern shark communities were established. |
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