Issue 46 / April 14, 2016

  1. Editor’s Note

    Issue 46: Gorgeous feathers, Cairo’s cave churches, ant trails, and clouds. /

  2. Simply Beautiful Feathers

    A display of birds’ useful adornments. /

  3. From Garbage to Glory

    The cave churches of Cairo offer sanctuary in the midst of squalor. /

  4. Not All Who Wander Are Lost

    How ants have solved the Traveling Salesman Problem. /

  5. Under the Cloud

    Five amazing facts about the fluffy, immense formations above our heads. /

  6. Wonder on the Web

    Issue 46: Links to amazing stuff.