PhysOrg Posted March 26, 2018 Share Posted March 26, 2018 Forty million miles of major roads crisscross the Earth's continents—enough to circle the planet 1,600 times. For humans, these thoroughfares are a boon, enabling them to move with ease from place to place. But for migrating animals who are also hemmed in by dams, rivers, shipping lanes, urban development and agriculture, they create another barrier. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.