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OLogy Card 057 comets Comets are like "dirty snowballs" that have orbited the Sun since our Solar System formed, billions of years ago. A comet... Educator Professional Learning Lynnae Quick, Course Instructor Lynnae Quick is an online instructor for Seminars on Science, the Museum's online professional learning program for educators. Educator Professional Learning Explorations of Nature - Bank Street (SCIE 510) Graduate Course with Bank Street College of Education - an introduction to the scientific exploration of the natural world. Educator Materials Make a Terrarium For billions of years the greenhouse effect has made life possible on Earth. Build a terrarium—your own miniature greenhouse—to see... Planetarium Programs 2014 Asimov Debate: Selling Space Space exploration is entering a new era with the birth of private aerospace companies whose goal is to commercialize space. Exhibit Stones Stony meteorites fall into two main groups: those that partially melted while they were in space, and those that did not melt. Exhibit Triceratops This 65-million-year-old Triceratops has a large frill on the back of its skull, two large horns over its eyes, and a smaller horn... Exhibit Dating rocks In order to understand geological processes, we need to envision time periods far greater than the hourly, daily, and yearly progression... Exhibit Allende. Presolar grains   Exhibit How do we read the rocks? How has the Earth evolved? Why are there ocean basins, continents, and mountains? Exhibit Meteorite impacts Countless impacts continue to shape Earth, other planets and moons in our dynamic Solar System. Exhibit How do we know? Determining the age of CAIs In a technique somewhat like the radiocarbon dating method used on fossils, researchers measure the amounts of certain forms, or...