Observe the blooming of a star dahlia flower
Time-lapse video, filmed over three days, of the opening of a star dahlia (Dahlia ‘Tahoma Star') flower.
Video by Neil Bromhall; music, Felipe Sarro/Musopen.org (A Britannica Publishing Partner)
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Encyclopædia Britannica, Inc.Cloud seeding can produce an extra 5 to 15% of precipitation.
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Adapted from C.R. Scotese, The University of Texas at ArlingtonWatch a time-lapse of Earth changing through geologic time, from the Cambrian Era to the projected period of Pangea Proxima.Media Editor: Miranda Chabot
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Encyclopædia Britannica, Inc.Both belong to the order Lepidoptera.
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Encyclopædia Britannica, Inc.It's not easy being green.
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Encyclopædia Britannica, Inc.An overview of a leaf and how its structure affects a plant's internal functions.
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Encyclopædia Britannica, Inc.Gymnosperms dominated the plant world until they were replaced by the more advanced flowering plants known as angiosperms.
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Encyclopædia Britannica, Inc.Learn about the unusual seed dispersal of the squirting cucumber (Ecballium elaterium).
