He placed them in a Petri dish and saw each frog's circulatory system through its translucent skin — "red with red blood cells." But when he came back later, the frogs were sleeping and the ...

As tiny glass frogs fall asleep for the day, they take almost 90 percent of their red blood cells out of circulation. The colorful cells cram into hideaway pockets inside the frog liver ...

Amphibians like glass frogs become see-through whilst sleeping - and now scientists have discovered how. The creatures hide 90 per cent of their red blood cells in their liver, which is mirror ...

“Red blood cells also absorb a lot of light, and we found that the frog can actually hide them by packing them into the liver.” Many aquatic creatures, like krill and salps, are see ...

Using light and ultrasound imaging technology, the researchers discovered the secret: While asleep, the frogs concentrate, or “hide,” nearly 90% of their red blood cells in their liver.

When tiny glass frogs turn in for the night, they're able to become transparent by hiding almost 90 percent of their red blood cells. The colorful areas are tucked away inside the frog's liver ...

Using light and ultrasound imaging technology, the researchers discovered the secret: While asleep, the frogs concentrate, or “hide,” nearly 90% of their red blood cells in their liver.

But for glass frogs and other invertebrates, the greatest challenge to translucency is their red blood cells, which naturally absorb light. Until recently, in fact, precisely how glass frogs wove ...

Left: Sleeping glass frogs visible through a leaf. Right: A sparse population of red blood cells zooming around a sleeping glass frog’s circulatory system. (Jesse Delia & Carlos Taboada ...

To hide from predators, this nocturnal amphibian stores 90% of its red blood cells in its liver during the day. Many frogs display shimmering colors in the tropical forests of Latin America ...

which frogs manage to avoid by storing and releasing around 90 per cent of their red blood cells into their livers on a regular basis. "There are more than 150 species of known glass frogs in the ...