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The World's Largest Wildlife Crossing

Can a science and engineering feat address a problem long thought to be too big to solve?

When it opens in December, the Wallis Annenberg Wildlife Crossing will be the largest in the world. Stretched over a ten-lane freeway, it is meant to save the California Mountain Lion population, which has become fragmented by the highway. It could also serve as a model for other projects, as crossings of this kind have often been viewed as too large to be effective. So, will the crossing work? We examine the construction and the existing scientific data to find out.

Release date:

23 minutes

On radio

Tue 11 Aug 2026 07:06GMT

Broadcasts

  • Tue 11 Aug 2026 07:06GMT
  • Tue 11 Aug 2026 14:06GMT
  • Tue 11 Aug 2026 17:06GMT
  • Tue 11 Aug 2026 21:06GMT
  • Sat 15 Aug 2026 21:06GMT
  • Sun 16 Aug 2026 09:06GMT
  • Sun 16 Aug 2026 17:06GMT
  • Mon 17 Aug 2026 02:06GMT

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