Using light and ultrasound imaging technology, researchers have discovered how some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance.
Scientists discover the secret power that makes glass frogs transparent
Glass frogs become see-through by hiding their blood, Science
Scientists reveal secrets of northern glass frogs' transparency - ABC News
Glassfrogs conceal blood in their liver to maintain transparency
Science - Page 54
Scientists find secret to how glass frogs turn transparent
3 Frog Pipe - Vibrant Ceramic Smoking Pipe at — Badass Glass
animals PBS NewsHour
White's Tree Frog
Scientists discover the secret power that makes glass frogs