How much of Earth's life is still undiscovered?

Short Wave's 14-minute episode explores the surprising frequency of new species discoveries on Earth, prompted by the recent announcement of a newly identified cat species—the first in over a century. The episode features John Wiens, a professor of ecology and evolutionary biology at the University of Arizona, who explains that we're living in an era of "unprecedented" species discovery. The core premise is that finding new species is far more common than most people realize, and that scientists have only begun to scratch the surface of understanding Earth's total biodiversity. The episode frames this discovery rate as remarkable given how much of the planet has been explored, raising implicit questions about how many organisms remain unknown to science and what this means for our understanding of life on Earth. The show notes suggest the episode uses the cute cat photos that circulated online as a cultural hook to draw listeners into a broader conversation about biodiversity discovery rates and the state of taxonomic science.

Verdict: A solid, accessible short-form science episode that delivers on its premise with a credible expert, though limited depth and scope prevent it from being essential listening.

Science rubric

• Scientific accuracy 3/5 20%

  Wiens is a credible expert in ecology and evolutionary biology, and the framing of 'unprecedented discovery' aligns with scientific consensus, but the show notes provide no specific claims to verify for accuracy or uncertainty caveats.

• Clarity for non-experts 4/5 20%

  The episode uses an accessible cultural hook (cat photos) and a straightforward premise (new species are being discovered frequently) that should be followable for general audiences, though actual clarity depends on how the explanation unfo

• Sense of discovery 3/5 15%

  The angle that species discovery is common rather than rare offers a modest fresh perspective, but the core idea that Earth's biodiversity is largely unmapped is well-established in science communication.

• Substance 3/5 15%

  A 14-minute episode with one expert guest and a focused premise suggests solid but limited content; the show notes don't indicate depth of exploration, specific examples beyond the cat, or detailed mechanisms of discovery.

• Delivers on its title 4/5 15%

  The title asks 'How much of Earth's life is still undiscovered?' and the episode directly addresses this by discussing discovery rates and the vastness of unknown biodiversity, though the show notes don't reveal how quantitatively the answe

• Value for time 3/5 15%

  At 14 minutes with one guest, the episode is concise and focused, but without knowing the pacing or whether tangents occur, a middle score reflects reasonable efficiency for the format.

How we score Science

Worth it if you enjoy bite-sized science news that connects current events (the cat discovery) to broader questions about biodiversity and want a quick, engaging introduction to how much life remains unknown on Earth.

Based on the episode description. AI-generated; it can be wrong.