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food chain
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Diatoms and other phytoplankton form the foundations of ocean food chains. Shrimplike krill consume the phytoplankton, and small fishes eat the krill. At the top of the food chain, dining on these smaller fishes, are larger, predatory fishes. terrestrial food chain
What role do spiders play in the food chain?
Algae, primarily diatoms, dinoflagellates, and coccolithophorids, which are often collectively called phytoplankton, are the base of the food chain for all marine organisms. energy pyramid
How an ecosystem works
Take an in-depth look at the variety of plankton, from diatoms and microflagellates to jellyfish
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Rusty patched bumble bee (Bombus affinis) photographed in the Midwest in 2017. endangered species insect pollination
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Bohr atomic model of a nitrogen atom.
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Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish
July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.
Will Light-Speed Space Travel Ever Be Possible?
Hemp (Cannabis sativa).
9 Mind-Altering Plants
Two chicks near an egg with a white background (poultry, chick, chickens, birds).
What Do Eggs Have to Do with Easter?
Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)
6 Important Mughal Emperors
Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.
9 of the World’s Deadliest Mammals
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”

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Photos and Videos

Diatoms and other phytoplankton form the foundations of ocean food chains. Shrimplike krill consume the phytoplankton, and small fishes eat the krill. At the top of the food chain, dining on these smaller fishes, are larger, predatory fishes.
terrestrial food chain
Algae, primarily diatoms, dinoflagellates, and coccolithophorids, which are often collectively called phytoplankton, are the base of the food chain for all marine organisms.
energy pyramid
What role do spiders play in the food chain?
How an ecosystem works
Take an in-depth look at the variety of plankton, from diatoms and microflagellates to jellyfish
See All Videos and Images →

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Key People

Charles Elton
English biologist

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Rusty patched bumble bee (Bombus affinis) photographed in the Midwest in 2017. endangered species insect pollination
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