There are clues for understanding blood clotting in humans found in a frog that is mostly transparent while sleeping.
The glass frog has been known to scientists, but they didn't know how it made it see-through.
It has been found that it is possible to pool blood without being affected by clot.
Blood clotting is a common serious condition.
In the tropics, the glass frog sleeps on bright green leaves.
The creature hides itself on the leaf in order to get the attention of the predator.
You could watch their heart beat by itself if you turned over the frog. The majority of the body is transparent and can be seen through the skin.
The glass frog performs a very unusual function thanks to the work of Mr. Delia and Carlos Taboada.
Scientists measured the animals' opacity by shining different wavelength of light through them while they were awake and asleep. They found that the creatures have blood in their body.
Most of the red blood cells are removed from the blood in the process. They do it without causing a massive clot.
The packed blood cells allow the frog to become transparent and double the size of the liver.
When the creature wants to hunt or mate, it releases red blood cells back into circulation at night.
When injured, the frog is able to clot blood.
He says the creature's "superpower" is its ability to pool and clot blood.
Blood pooling together can lead to clot which can be life threatening in humans.
It could take decades to transfer that knowledge to practical use.
The research is in a journal.
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