"I arrived in the morning to see when she was erupting and estimated the night eruption between 8 p.m. and 8:48 p.m. Around 8:15 p.m., the moon entered full eclipse then Old Faithful Erupted, one ...

Old Faithful erupts every 35 to 120 minutes, spewing 3,700 to 8,400 gallons of boiling water 90 to 184 feet into the air for 1 1/2 to 5 minutes. The temperature of the water at the vent has been ...

In this video, about 30 tourists walk out onto Old Faithful at Yellowstone National Park on April 27, 2011. Three people were ultimately cited by park authorities with $125 fines. The video was ...

Old Faithful Geyser next to the Old Faithful Inn, illustrating how high the eruptions can reach. (Photo by Jeff Vanuga) Old Faithful can vary in height from 100-180 feet with an average near 130 ...

Only when Johann Franz Encke, then just 27 years old, worked out the orbit, did it become clear to him that the comets observed in 1786, 1795, 1805, and 1818 were one in the same.

Old Faithful General Store—An original log structure serves typical family-friendly food, like hamburgers and ice cream, including the popular huckleberry ice cream, one of the top things to do ...

Old Faithful, a popular draw at Yellowstone, erupts every 90 minutes or so, shooting boiling water 100 feet or more toward the sky. The water tumbles through the cold-by-comparison air, plunges ...