The unattached appendage had been found floating in the scalding-hot water by park staff earlier this year.
A visitor has been banned from the park after being caught attempting to use the hot springs to cook chicken.
It turns out that a supervolcanic eruption at Yellowstone National Park may not happen for a very long time.
The enormous supervolcano in Yellowstone National Park could erupt with only a few years' warning.
NASA has come up with an ambitious new plan to cool down the supervolcano by using it as an energy source.
Wildlife authorities are offering a $5,000 reward to anyone who can help track down those responsible.
A chamber containing 11,200 cubic miles of molten rock has been found below Yellowstone National Park.
The famous Morning Glory hot spring pool has turned green due to visitors throwing things in to it.
Four unidentified figures have been captured in a controversial video recorded through a webcam.
In the event of an eruption the volcano could spew out 2,000 times the debris of Mount Saint Helen's.
The supervolcano at Yellowstone National Park is believed to be 2.5 times larger than earlier estimates.
Researchers discover that the Yellowstone super-volcano is a lot more active than previously thought.
Strange celestial sounds have been heard by visitors to the picturesque Yellowstone National Park.
Its been sitting dormant below Yellowstone National Park for 600,000 years and is now overdue.
Scientists believe that methane rain on Saturn's moon Titan may have formed a new lake four times the size of Yellowston...