Encyclopedia Reference Stock Videos

Browse 272 encyclopedia reference videos and clips available to use in your projects, or start a new search to explore more footage and b-roll video clips.

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energy: a matter of choices - part 30 of 38. east coast "blackouts" and "brownouts," wintertime heating oil shortages, national gasoline shortages - each year the situation seems to get worse. this timely film aims to help students interpret the energy cr - encyclopedia reference stock videos & royalty-free footage
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Energy: A Matter of Choices - part 30 of 38. East Coast "blackouts" and "brownouts," wintertime heating oil shortages, national gasoline shortages - each year the situation seems to get worse. This timely film aims to help students interpret the energy cr
Research, Solar Panel, Old-fashioned
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gymnosperms - part 25 of 29. demonstrates that gymnosperms are seed plants which bear their seeds on cones. animation and time-lapse sequence trace the life cycle of the pine through the growth of the pollen and seed cones, pollination, fertilization, and - encyclopedia reference stock videos & royalty-free footage
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Gymnosperms - part 25 of 29. Demonstrates that gymnosperms are seed plants which bear their seeds on cones. Animation and time-lapse sequence trace the life cycle of the pine through the growth of the pollen and seed cones, pollination, fertilization, and
Bristlecone Pine
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parasitism (parasitic flatworms) - part 17 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 17 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
Scientist, Mouse - Animal, Healthcare And Medicine
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parasitism (parasitic flatworms) - part 9 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 9 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
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parasitism (parasitic flatworms) - part 8 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 8 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
Laboratory, Frog
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parasitism (parasitic flatworms) - part 7 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 7 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
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parasitism (parasitic flatworms) - part 3 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 3 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
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parasitism (parasitic flatworms) - part 2 of 28. traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. defines predation, mutualism, internal and - encyclopedia reference stock videos & royalty-free footage
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Parasitism (Parasitic Flatworms) - part 2 of 28. Traces the development of parasitic flatworms, showing several life-cycle stages that have rarely been photographed before, including blood flukes and tapeworms. Defines predation, mutualism, internal and
Healthcare And Medicine, Termite
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what is a fish? - part 13 of 39. illustrates the major types of fishes. shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. underwater photography is used to reveal behavior patterns such as c - encyclopedia reference stock videos & royalty-free footage
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What is a Fish? - part 13 of 39. Illustrates the major types of fishes. Shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. Underwater photography is used to reveal behavior patterns such as c
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what is a fish? - part 12 of 39. illustrates the major types of fishes. shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. underwater photography is used to reveal behavior patterns such as c - encyclopedia reference stock videos & royalty-free footage
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What is a Fish? - part 12 of 39. Illustrates the major types of fishes. Shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. Underwater photography is used to reveal behavior patterns such as c
Scalpel, Cutting
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what is a fish? - part 11 of 39. illustrates the major types of fishes. shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. underwater photography is used to reveal behavior patterns such as c - encyclopedia reference stock videos & royalty-free footage
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What is a Fish? - part 11 of 39. Illustrates the major types of fishes. Shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. Underwater photography is used to reveal behavior patterns such as c
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what is a fish? - part 10 of 39. illustrates the major types of fishes. shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. underwater photography is used to reveal behavior patterns such as c - encyclopedia reference stock videos & royalty-free footage
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What is a Fish? - part 10 of 39. Illustrates the major types of fishes. Shows the anatomy of a typical fish and demonstrates characteristic behavior patterns of various kinds of fishes. Underwater photography is used to reveal behavior patterns such as c
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continent of africa (lands below the sahara) - part 32 of 37. shows causes and effects of africa's political and social revolutions; the contrasts in the way of life of its indigenous peoples; the physical geography of the continent; and the non-african's - encyclopedia reference stock videos & royalty-free footage
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Continent of Africa (Lands Below the Sahara) - part 32 of 37. Shows causes and effects of Africa's political and social revolutions; the contrasts in the way of life of its indigenous peoples; the physical geography of the continent; and the non-African's
Africa
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