Yellowstone National Park in the context of "Compound volcano"

A national park is a nature park designated for conservation purposes because of unparalleled national natural, historic, or cultural significance. It is an area of natural, semi-natural, or developed land that is protected and owned by a government. Although governments hold different standards for national park designation, the conservation of 'wild nature' for posterity and as a symbol of national pride is a common motivation for the continued protection of all national parks around the world. National parks are almost always accessible to the public. Usually national parks are developed, owned and managed by national governments, though in some countries with federal or devolved forms of government, "national parks" may be the responsibility of subnational, regional, or local authorities.

The United States established Yellowstone National Park, the first "public park or pleasuring-ground for the benefit and enjoyment of the people," in 1872. Although Yellowstone was not officially termed a "national park" at the time, in practice it is widely held to be the first and oldest national park in the world. The Tobago Main Ridge Forest Reserve (in what is now Trinidad and Tobago; established in 1776) and the area surrounding Bogd Khan Uul Mountain (Mongolia, 1778), which were restricted from cultivation to protect surrounding farmland, are considered the oldest legally protected areas. Parks Canada, established on May 19, 1911, is the world's oldest national park service.

A hot spring, thermal spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circulation through faults to hot rock deep in the Earth's crust.

Hot spring water often contains large amounts of dissolved minerals. The chemistry of hot springs ranges from acid sulfate springs with a pH as low as 0.8, to alkaline chloride springs saturated with silica, to bicarbonate springs saturated with carbon dioxide and carbonate minerals. Some springs also contain abundant dissolved iron. The minerals brought to the surface in hot springs often feed communities of extremophiles, microorganisms adapted to extreme conditions, and it is possible that life on Earth had its origin in hot springs.

A geyser (/ˈɡaɪzər/, UK: /ˈɡiːzər/) is a spring with an intermittent water discharge ejected turbulently and accompanied by steam. The formation of geysers is fairly rare and is caused by particular hydrogeological conditions that exist only in a few places on Earth.

Generally, geyser field sites are located near active volcanic areas, and the geyser effect is due to the proximity of magma. Surface water works its way down to an average depth of around 2,000 metres (6,600 ft) where it contacts hot rocks. The pressurized water boils, and this causes the geyser effect of hot water and steam spraying out of the geyser's surface vent.

Genesee Park is a park in Jefferson County, Colorado. It is the largest park in the Denver Mountain Parks system, with a total of 2,413 acres (9.77 km). The land for Genesee Park was initially purchased in 1912 and the park area was largely complete by 1926.

The park contains two mountains, Genesee Mountain at 8,284 feet (2,525 m) above sea level and Bald Mountain at 7,988 feet (2,435 m) above sea level. The park also contains forests of ponderosa pine, Douglas-fir, and lodgepole pine. Interstate 70 traverses the park between exits 252 and 254 along the Lariat Loop Scenic & Historic Byway. On I-70 just west of exit 254, there are scenic overlooks for both directions for viewing the historic Bison herd, which live on maintained pastures on the north and south sides of I-70. The park's bison herd is owned by the City and County of Denver. Some of the original bison were acquired from Yellowstone National Park by the Denver Zoo and the City of Denver as early leaders in the conservation of bison. The bison herd moved here in 1914 and was expanded to Daniels Park in 1938. Thirty five bison were distributed to Native American tribes in 2023.

An extremophile (from Latin extremus 'extreme' and Ancient Greek φιλία (philía) 'love') is an organism that is able to live (or in some cases thrive) in extreme environments, i.e., environments with conditions approaching or stretching the limits of what known life can adapt to, such as extreme temperature, pressure, radiation, salinity, or pH level.

Since the definition of an extreme environment is relative to an arbitrarily defined standard, often an anthropocentric one, these organisms can be considered ecologically dominant in the evolutionary history of the planet. Extremophiles have continued to thrive in the most extreme conditions, making them one of the most abundant lifeforms. The study of extremophiles has expanded human knowledge of the limits of life, and informs speculation about extraterrestrial life. Extremophiles are also of interest because of their potential for bioremediation of environments made hazardous to humans due to pollution or contamination.

A scatter plot, also called a scatterplot, scatter graph, scatter chart, scattergram, or scatter diagram, is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded (color/shape/size), one additional variable can be displayed.The data are displayed as a collection of points, each having the value of one variable determining the position on the horizontal axis and the value of the other variable determining the position on the vertical axis.

The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world, after Frying Pan Lake in New Zealand and Boiling Lake in Dominica. It is located in the Midway Geyser Basin.

Grand Prismatic Spring was noted by geologists working in the Hayden Geological Survey of 1871, and named by them for its striking coloration. Its colors match most of those seen in the rainbow dispersion of white light by an optical prism: red, orange, yellow, green, and blue.