Explore lesson plans, videos, interactives and slideshows covering the reclassification of Pluto from a planet to a dwarf planet. Follow the story of Pluto's discovery and learn the science surrounding this former planet. Details »
Classroom Resources
Examine letters from 3rd graders expressing their opinions about Pluto's reclassification, starting in 2000. Note how their tone shifted over the years, as the public slowly came to accept Pluto's fall from planethood in 2006. Details »
Explore the planets and dwarf planets of the Solar System; learn about their discoveries, the origin of their names, distance from the sun, orbit length, number of moons, size and temperature. Hear scientists' opinions and vote for your favorite. Details »
See how bacteria living on a microscopic horizon between salt water and fresh water in a Florida warm springs cave provide a basis for all life in the cave. Details »
Examine this introduction to the water pollutant known as red tide and the danger that it poses to manatees and other animals in Florida's warm springs. Details »
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Development and the Environment
Take a look at how population growth and development affect the environment, and find ideas for maintaining this delicate balance.
Technology and Ethics
Examine controversial issues brought about by technological advances in genetics, cloning, stem cell research, and reproductive medicine, and discuss the ethical issues behind the controversies.
