A glasswing butterfly feeding at flowers in Costa Rica. The remarkable transparency of these butterflies allows them to be “invisible,” and the antiglare coating of their wings helps to prevent them from being given away by any glare of sunlight off their wings. Credit: Nipam Patel Many animals have evolved […]

Polychaete worm, Tomopteris, with setae moving on each side of the body in metachronal waves. Credit: Sean Colin   ANIMATION When you think of swimming, you probably imagine pushing through the water—creating backwards thrust that pushes you forward. New research at the Marine Biological Laboratory (MBL) suggests instead that many marine […]