Examine the protein shell and RNA- or DNA-filled inner core of an icosahedral virus
Animation of an icosahedral (20-sided) virus.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.Algae blooms can make lakes and oceans look like abstract paintings.
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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.Artemis II is sending human organs around the Moon. Why?Media Editor: Lauren Sims
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Encyclopædia Britannica, Inc.Learn about the difference between prokaryotes and eukaryotes.
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© MinuteEarth (A Britannica Publishing Partner)A survey of the largest known single living organisms on Earth, which includes representatives from the animal, plant, and fungal kingdoms.
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Encyclopædia Britannica, Inc.The cycle of infection results in the death of the host cell and the release of many virus particles, called virions.
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Encyclopædia Britannica, Inc.Knowing the difference isn't just a technical distinction—it can save lives.