Why are There 30 Million Horseshoe Crabs on This Beach?

Every spring, the beaches of Delaware Bay play host to one of the world’s wildest parties. Millions of prehistoric crabs (and hundreds of thousands of birds) converge here. These horseshoe crabs spend most of their lives in the ocean depths. But every May and June, their spindly little legs will carry them 60 miles or more to congregate on sandy beaches up and down the Atlantic coast.

More Episodes

The Secret Islands of the Everglades

These secret islands of the Everglades might be the key to saving it.

Want to Solve Wildfires and Drought? Leave it to BEAVERS!

Could beavers be the ally we’ve been waiting for when it comes to saving the environment?!

Why the Fastest Place on Earth is Disappearing

The Bonneville Salt Flats took millions of years to form. We altered it in a century.

Other Shows You May Enjoy