They've been around for millennia. Today, fences zigzag every continent, marking property, keeping livestock in, and keeping pests out.
Wenjing Xu, a researcher with the Senckenberg Biodiversity and Climate Centre in Frankfurt, Germany, and a pioneer of fence ecology, says there is still so much we don't know about how fences change the ecosystems and wildlife that exist around them.
She joins Emile Donovan.
Photo: RNZ / Kate Green
