Extras

Video thumbnail: Nature Social Spiders Build Massive Nests

Nature

Social Spiders Build Massive Nests

A spider found in the Caribbean and South America build nests more than 20 feet across.

Social Spiders Build Massive Nests

Video thumbnail: Nature Animal Homes: Cities - Preview

Nature

Animal Homes: Cities - Preview

Premieres April 22, 2015 at 8/7c on PBS. Check your local listings.

Animal Homes: Cities - Preview

Video thumbnail: Nature Puffins Search for the Perfect Home

Nature

Puffins Search for the Perfect Home

Puffins search for the perfect piece of real estate where they can raise their young.

Puffins Search for the Perfect Home