Extinction
Paleontologists have found the southernmost fossils of Purgatorius, the earliest known relative of primates including humans, in Colorado's Denver Basin. These tiny teeth, smaller than a fingertip, suggest the shrew-sized mammal spread southward soon after the dinosaur extinction 66 million years ago. The discovery fills a gap in the early geographic history of primate ancestors.
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The extinction of large animals by ancient humans triggered profound ecological changes that reshaped global history, according to a new essay series. In its final part, author Ed Stoddard explores how these 'aftershocks' led to denser forests in the Americas and Europe while burdening Africa with dangerous wildlife. This longue duree perspective highlights animals' role in human development.
A new analysis of 500 years of extinction data reveals that species losses peaked about a century ago and have since declined, contradicting assumptions of a rapidly worsening crisis. Researchers from the University of Arizona found that past extinctions were mainly driven by invasive species on islands, while current threats center on habitat destruction on continents. The study emphasizes the need for accurate assessments to inform conservation efforts.
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A new study challenges the idea that dinosaurs were declining before their extinction 66 million years ago. Researchers found evidence of thriving dinosaur communities in New Mexico right up to the asteroid strike. The findings highlight distinct regional ecosystems shaped by climate.