Assertion: mass extinction | /r/CreatedBy | asteroid
Facets:
Source sentences:
text: The impact extinction theory that mass extinctions were indeed caused by asteroid (or other) impact is a good one because it falls into the mainstream of scientific inquiry: an hypothesis that can be tested, and falsified, with further sampling or experimentation
text: While the mass extinctions of eons past were likely caused by volcanoes, asteroids or other natural catastrophes, extinctions today are almost completely driven by human behavior, such as habitat destruction, introduction of invasive species and global warming.