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feature story
Marine mammals stroke-and-glide to depth

Video supplied by cameras attached to dolphins, seals and whales reveals how the marine mammals employ a stroke-and-glide sequence that enables them to perform long, deep dives that seem to exceed their aerobic capacities.

FULL STORY
QUIZ:

The majority of the Earth's ozone gas is found in what layer of the atmosphere?

A. stratosphere
B. thermosphere
C. ionosphere
More stories:

  • Study confirms animals use 'armpit effect'

  • Commission warns of possible water shortages in Great Lakes basin

  • New conservation measures urged for US fisheries

  • Judge says EPA can set runoff limits for rivers

  • NASA, EU report massive arctic ozone loss

  • Scientists plumb life beneath the Amazon

  • Researcher using DNA to study Great Potato Famine

  • New species fills evolutionary gap

  • Study: Sharing among monkeys suggests roots of cooperative behavior

  • Arctic warming signals dire straits for birds

  • Life-saving air bags pack deadly chemical

  • Possible vegetarian dinosaur nests found in Argentina

  • Chile mulls plan to curb global warming

  • Uranium mill still poisons Colorado River

  • States turn a blind eye to Clean Water Act

    		•
    MORE NEWS:

    ENVIRONMENT:
  • Earth Matters: After big game dwindles, guide switches to wolf tours

  • Tormenting terns to save salmon

  • Earth Matters: Yellowstone, Smokies on list of endangered U.S. parks


    DISCOVERIES:
  • New iceberg adrift off Antarctica

  • Virginia hill may be site of oldest American settlement to date

  • National Geographic admits feathered dinosaur error


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