INDEX CREDITS Sort By: 1-20 of 68| pages: 1 2 3 4 | Next > Acid Oceans Activity for grades 6 through 12 Since the beginning of the Industrial Age, the ocean has been becoming more acidic. Find out how this change is hampering the development of hard-shelled marine creatures, leaving them more vulnerable to environmental stressors. Webpage More about this Resource Astro Snapshot Evidence and Analysis for grades 6 through 12 Don't miss the latest spectacular images from observatories around the world and in space. Visit our weekly Astro Snapshot for new sightings in our observable universe. Webpage More about this Resource Astro Viz: Cassini-Huygens Explores Saturn Article for grades 6 through 12 Saturn’s largest moon, Titan, is the last place in the solar system whose surface is a complete mystery. But that will soon change! Track the Cassini spacecraft and its Huygens probe. Webpage More about this Resource Astro Viz: Colliding Galaxies Article for grades 6 through 12 In three billion years, our Milky Way Galaxy will collide with its nearest neighbor, the Andromeda Galaxy. See how these two spiral galaxies are expected to merge, forming an elliptical galaxy. Webpage More about this Resource Astro Viz: Earth's Magnetic Shield Article for grades 6 through 12 Light and heat aren't the only things the Sun emits. Tiny particles also stream away from the star. What threat do these solar winds pose to the Earth's magnetic shield? Webpage More about this Resource Astro Viz: Extrasolar Planets Article for grades 6 through 12 Since 1995, astronomers have discovered more than 100 planets orbiting stars beyond our Sun—only a fraction of those thought to exist. Take an interactive tour of the Milky Way Galaxy to visit these "exoplanets." Webpage More about this Resource Astro Viz: Nearby Stars Article for grades 6 through 12 We see only a fraction of the stars in our Milky Way Galaxy when we gaze at the night sky. Find out why the stars that appear brightest to us are not necessarily the closest to Earth. Webpage More about this Resource Astro Viz: New Horizons Mission to Pluto Article for grades 6 through 12 On January 19, 2006, a spacecraft set out on a decade-long voyage to Pluto and its moons. By studying this "icy dwarf" up close, scientists hope to determine whether Pluto is, in fact, a planet. Webpage More about this Resource Bio Snapshot Evidence and Analysis for grades 6 through 12 What events and discoveries are making news in the areas of biodiversity and conservation? Get the latest nature images and updates with our weekly Bio Snapshot. Webpage More about this Resource Bio Viz: Congo Landcover Article for grades 6 through 12 In the 1960s, loggers introduced a new way of life to the jungles around the Sangha River. See how satellites are helping scientists track the effects on the Congo’s biodiversity. Webpage More about this Resource Bio Viz: Congo River Article for grades 6 through 12 See how satellite images and new computer techniques helped AMNH scientists create a hypothesis about closely related fish species in the lower Congo river. Webpage More about this Resource Bio Viz: Fire Article for grades 6 through 12 Fire is a natural part of Earth's ecosystems. But increasingly, human activity is changing the frequency, intensity, and patterns of fire around the world—sometimes with devastating results. Webpage More about this Resource Bio Viz: Global Fires 2001-2005 Article for grades 6 through 12 Human activity has changed the frequency, intensity, and patterns of fires around the world. See how these changes in fire regimens are reshaping the face of our planet. Webpage More about this Resource Bio Viz: Global Fires 2002–2008 Article for grades 6 and up Fire is part of natural landscapes around the world, clearing out old vegetation and making way for new growth. But what does it mean when human activity changes natural fire patterns? Webpage More about this Resource Bio Viz: Logging Old-Growth Forests on Private Lands Article for grades 6 through 12 See why conservationists are urging private landowners to protect the remaining tracts of old-growth forest in the Central Pacific Coastal Forest, which stretches from northern California to Canada. Webpage More about this Resource Bio Viz: Urban Sprawl: Phoenix Article for grades 6 through 12 Investigate why the population density for Phoenix, Arizona, has increased—by necessity—in recent decades even while the urban area's boundaries have grown more slowly. Webpage More about this Resource Earth Snapshot Evidence and Analysis for grades 6 through 12 Earth never sleeps—its land, seas, and air are in constant motion. Stay up-to-date with our weekly Earth Snapshot, which tracks worldwide volcano and earthquake activity. Webpage More about this Resource Earth Viz: Arctic Sea Ice 1997-2005 Article for grades 6 through 12 The distribution of Arctic sea ice has been steadily declining over the past few decades. Explore how a positive feedback loop is contributing to warmer global temperatures. Webpage More about this Resource Earth Viz: Global CO Emissions Article for grades 6 through 12 Studying CO emissions and their effects is not new ... but measuring them in the lower atmosphere is. Take a look at MOPITT, the pioneering instrument aboard NASA’s Terra satellite. Webpage More about this Resource Earth Viz: Global Ozone Article for grades 6 through 12 Since 1980, ozone levels over the Antarctic have dropped by 55 percent. Explore how policy changes in the 1990s have curtailed the use of ozone-destroying chemicals. Webpage More about this Resource 1-20 of 68| pages: 1 2 3 4 | Next >