How Close Are We to a New Mass Extinction?

Quick Overview

The current rate of species loss, driven by human activity, suggests that a sixth mass extinction event, comparable in scale to the dinosaur extinction, is likely to occur around the year 2400 if current trends continue, although some scientists argue against officially designating this period as the Anthropocene epoch based on geological definitions.

Key Points: The current extinction rate is estimated to be large enough to qualify as a mass extinction event, potentially comparable to the one that wiped out the dinosaurs 66 million years ago, based on recent large analyses. The Living Planet Index shows that monitored wildlife populations have declined by nearly 70% since 1970, indicating a rapid acceleration of loss. Geologists are debating whether the current era should be formally named the Anthropocene, with some arguing against it because they believe pre-1950 industrial and colonial impacts were not globally synchronous enough to warrant a new epoch designation. The International Union for Conservation of Nature (IUCN) reported "no new extinctions" in its latest update, even though less than a tenth of one percent of recorded species have gone extinct in the past 400 years. The video host expresses frustration with scientists who reject the Anthropocene designation because they ignore overwhelming evidence of long-term anthropogenic transformation, emphasizing that relying only on belief rather than data is against scientific tenets. Ecologists suggest that if current trends continue, a mass extinction event equivalent to past ones could occur in about 300 to 400 years, around the year 2400.

Context: The video discusses the scientific debate surrounding whether humanity's impact on Earth warrants the designation of a new geological epoch, the Anthropocene, which implies a mass extinction event driven by human activity. It contrasts alarming data on species loss, such as the steep decline shown by the Living Planet Index, with the formal requirements for defining a geological epoch, highlighting the controversy over when the supposed 'tipping point' occurred and the criteria used by the Anthropocene Working Group (AWG).