Do you know that there are more than 50 national parks and more than 100 national monuments, excluding national seashores and historic parks in the United States? This summer, the US Park Service is encouraging tourism to these parks to boost the economy by waiving entrance fees in one weekend for the month of August (August 15-16, 2009).

The recent earthquake swarm at Yellowstone is not an indication of unusual volcanic activity. Earthquake swarms are normal geologic events at active volcanic systems. US Geological Survey vulcanologists who specialize in studying Yellowstone have determined that the volcano alert level there is normal.

Biology graduate student Sarah McMenamin spent 3 summers in a remote area of the park searching for frogs and salamanders in ponds that had been surveyed 15 years ago; Almost everywhere she looked, she found a catastrophic decrease in the population

The geysers of Yellowstone National Park owe their eistence to the "Yellowstone hotspot"--a region of molten rock buried deep beneath Yellowstone, geologists have found.

Scientists studying microbial communities and the growth of sedimentary rock at Mammoth Hot Springs in Yellowstone National Park have made a surprising discovery about the geological record of life and the environment.

Recent satellite pictures of Yellowstone National Park in Wyoming from 2004 through 2006 are showing that an ancient volcano is starting to rise once again.

If Mark Boyce could converse with elk, he might give them a word of advice: avoid open, flat, snowy areas near rivers and roads.

In the hot springs of Yellowstone National Park, a team of researchers partially funded by the National Science Foundation (NSF) discovered a new bacterium that transforms light into chemical energy.