Discover more about how all living things have basic life processes.

		Dichotomous Key for Conifers Evidence and Analysis for grades 6 through 12 Like all dichotomous keys, this one for conifers, fittingly looks like a series of branches. Gather a twig that has the tree’s cones or fruits on it. Then branch out and identify your conifer.
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		Online Field Journal: Compare Activity for grades Kindergarten through 5 No matter what the weather or season, you can explore nature with these 11 online challenges. See just how good your observation skills are by comparing butterflies, leaves, reptiles, fish, and more.
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		Online Field Journal: Field Journals Activity for grades Kindergarten through 5 Don't just explore the wonders of nature. Record them! From seashells and birds to animal tracks and spiders, these printable field journals are great guides for your next nature walk.
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		Video Gallery: Life at the Deep Sea Vents Evidence and Analysis for all grades up to 12 Descend nearly two kilometers below the Pacific's surface to a place devoid of sunlight—but not life. See the crabs, fishes, and worms that live near the sulfide chimneys at the Juan de Fuca Ridge.
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Discover more about the diversity of animals and the how their body differences help them survive.

		Comparison: Catshark and Freshwater Ray—Form and Function Evidence and Analysis for grades 9 through 12 Even though their bodies are made of cartilage, the freshwater stingray and the nursehound catshark have very different builds. Pick them up, spin them around, and see virtually all their differences.
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		SEM Ground Spider Interactive Evidence and Analysis for grades 9 through 12 Every wonder what a spider's eyes, fangs, or spinnerets look like up close? Find out with these photographs taken with a scanning electron microscope, which can magnify a specimen up to 500,000 times!
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		Spotlight on Spiders Evidence and Analysis for grades 6 through 12 Not all spiders trap their prey in webs. Crab spiders patiently lie in wait, and wolf spiders actively hunt their prey. Take a closer look at the diverse spiders that live everywhere but Antarctica.
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		Online Field Journal: Compare Activity for grades Kindergarten through 5 No matter what the weather or season, you can explore nature with these 11 online challenges. See just how good your observation skills are by comparing butterflies, leaves, reptiles, fish, and more.
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		Diversity of Fishes: Bloch Illustrations Evidence and Analysis for all grades up to 12 A surgeon by training, Marcus Elieser Bloch became a student of fish by chance. Yet, more than two centuries later, his work is still world renowned. See why with these 34 hand-colored illustrations.
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Discover more about ecosystems, food chains, food webs, and the interdependence among living things.

		Horseshoe Crabs and Birds: Could This Living Fossil Become Extinct? Article for grades 6 through 12 Don't be fooled by the name—horseshoe crabs are actually more closely related to spiders, scorpions, and ticks than to crabs and other crustaceans. Learn more about this "living fossil" that predates the dinosaurs.
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		Going to Gabon: Why Do Fish Matter? Article for grades 6 through 12 Why should we be concerned about the fish that live in the rain forest rivers of Gabon, Africa? For starters, these fish are an early warning system, signaling threats to the water and environment.
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		Video Gallery: Why Conserve Sharks? Article for grades 6 through 12 Why do so few sharks get cancerous tumors? What role do their immune systems play in keeping them healthy? See how scientists are approaching these questions.
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Discover more about how organisms compete and adapt in their environments, and the effects that changes to an ecosystem has on its organisms.

		Florida's Fragile Reefs: What's Happening to this Underwater World? Article for grades 6 through 12 Investigate reefs in the Florida Keys to see how and why they are dying not just there, but all over the world. Then learn what can be done to save these "rain forests of the sea."
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		Going to Gabon: Why Do Fish Matter? Article for grades 6 through 12 Why should we be concerned about the fish that live in the rain forest rivers of Gabon, Africa? For starters, these fish are an early warning system, signaling threats to the water and environment.
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		Video Gallery: Fishes and Water Article for grades 9 through 12 You can find fish from the highest mountain streams to the very depths of the ocean. In fact, of all the groups of animals alive on the planet, fish inhabit the widest bandwidth.
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