Scientists unlock how glass frogs turn transparent<br /><br />A frog that turns itself mostly transparent while sleeping may hold clues for understanding blood clotting in humans.<br /><br />Scientists have long known about the glass frog but did not understand how it made itself see-through.<br /><br />Now research has discovered that it is able to pool blood in its body without being negatively affected by clots.<br /><br />The findings could advance medical understanding of dangerous blood clotting - a common serious condition.<br /><br />The glass frog - which is about the size of a marshmallow - spends its days sleeping on bright green leaves in the Tropics.<br /><br />In order to escape the attention of predators, the creature turns itself up to 61% transparent, disguising itself on the leaf.
