npshistory.com的 10 大竞争对手

nps.gov

Park Ranger Peter Kasin explains how sea chanteys were used to coordinate work aboard vessels. Like to join a chantey sing in the park? Check here for info: https://go.nps.gov/1b9c2q

nationalparks.org

As the official charitable partner of the National Park Service, we provide resources for the national parks. Support this uniquely American idea.

npca.org

A collection of NPCA magazine articles, blog posts, and podcast episodes highlighting paleontology in the national parks.

rooseveltcampobello.org

Roosevelt Campobello International Park is a singular example of international cooperation - jointly administered, staffed, and funded by the peoples of Canada and the United States. Franklin and Eleanor Roosevelt’s magnificent summer home is preserved here in a combination indoor museum and outdoor

blm.gov

When you get involved with our Resource Advisory Councils (RACs) and advisory committees, you can help in the BLM’s mission to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations. The BLM maintains chartered advisory councils primarily located in the West. These include statewide and regional RACs, advisory committees affiliated with specific sites on the BLM’s National Conservation Lands, and the National Wild Horse and Burro Advisory Board. Advisory committees are invaluable to the BLM because consensus

usgs.gov

The Energy Act of 2020 defined critical minerals as those that are essential to the economic or national security of the United States; have a supply chain that is vulnerable to disruption; and serve an essential function in the manufacturing of a product, the absence of which would have significant consequences for the economic or national security of the U.S. The act further specified that critical minerals do not include fuel minerals; water, ice, or snow; or common varieties of sand, gravel, stone, pumice, cinders, and clay. Mineral criticality is not static, but changes over time as supply and demand dynamics evolve, import reliance changes, and new technologies are developed. The 2025 list of critical minerals/elements includes:AluminumCobaltHafniumMetallurgical CoalRhodiumThuliumAntimonyCopperHolmiumNeodymiumRubidiumTinArsenicDysprosiumIndiumNickelRutheniumTitaniumBariteErbiumIridiumNiobiumSamariumTungstenBerylliumEuropiumLanthanumPalladiumScandiumUraniumBismuthFluorsparLeadPhosphateSiliconVanadiumBoronGadoliniumLithiumPlatinumSilverYtterbiumCeriumGalliumLutetiumPotashTantalumYttriumCesiumGermaniumMagnesiumPraseodymiumTelluriumZincChromiumGraphiteManganeseRheniumTerbiumZirconiumLearn More: National Minerals Information CenterCritical MineralsUSGS Mineral Resources Program

hmdb.org

Public history cast in metal, carved on stone, permanently marked.

loc.gov

The Frequently Asked Questions page for NLS offers answers about eligibility, services, certification requirements, and more

britannica.com

Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.