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What will Earth look like in 500 years?
"The 26th century" doesn't roll off the tongue as easily as "the 21st century" does. But that hasn't stopped us from imagining what our hometown planet will be like in a few hundred years. Any guesses? Read more »
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  • Carlsbad Caverns National Park. National Park Service.http://www.nature.nps.gov/geology/parks/cave/
  • Gunung Mulu National Park. Forest Department of Sarawak, Malaysia.http://www.forestry.sarawak.gov.my/forweb/np/np/mulu.htm
  • Lovgren, Stefan. "Giant Crystal Cave's Mystery Solved." National Geographic News. April 6, 2007.http://news.nationalgeographic.com/news/2007/04/070406-giant-crystals.html
  • Mammoth Cave National Park. GORP.http://gorp.away.com/gorp/resource/us_national_park/ky_mammo.htm
  • Mammoth Cave National Park, Kentucky. U.S. World Heritage Sites. National Park Service.http://www.nps.gov/history/worldheritage/mammoth.htm
  • Mulu Caves (Gua Mulu) in Sarawak, Malaysia. Malaysia Central.http://www.malaysiacentral.com/information-directory/attractions-places-to-visit/caves/mulu-caves-gua-mulu-in-sarawak-malaysia/
  • O'Hanlon, Larry. "Excavating the World's Basements." Discovery.http://dsc.discovery.com/convergence/planet-earth/guide/caves.html
  • Waitomo Glowworm Caves. Discover Waitomo.http://www.waitomo.com/glowworm-caves-information.aspx