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Giant whale sharks have teeth on their eyeballs

The ocean's largest shark relies on vision more than previously believed.

Photo by Koichi Kamoshida/Getty Images
  • Japanese researchers discovered that the whale shark has "tiny teeth"—dermal denticles—protecting its eyes from abrasion.
  • They also found the shark is able to retract its eyeball into the eye socket.
  • Their research confirms that this giant fish relies on vision more than previously believed.
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The great white shark has surprising dining habits

Scientists are befuddled by where the shark gets most of its food.

Photo by Gerald Schömbs / Unsplash
  • A University of Sydney research team found that the great white shark spends an unexpectedly large amount of time feeding close to the sea bed.
  • The group examined the contents in the stomachs of 40 juvenile white sharks and found the remains of a variety of fish species that typically inhabit the sea floor or are buried in the sand.
  • The scientists hope that the information gained from this research will assist conservation and management efforts for the species.
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New fossils reveal first known swimming dinosaur

Non-avian dinosaurs were thought terrestrially bound, but newly unearthed fossils suggest they conquered prehistoric waters, too.

  • Spinosaurus has remained an elusive quarry for paleontologists despite its initial discovery more than 100 years ago.
  • A recent study of newly excavated fossils suggests the 40-foot-long therapod swam and hunted in waterways.
  • If future evidence confirms the study's findings, it may change our understanding of the Mesozoic era.
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    19th-century atlas offers glimpse of North Sea's fish-rich past

    O.T. Olsen's gorgeous 'Piscatorial Atlas' (1883) describes a world now destroyed and forgotten

    Image: Wellcome Collection. Public domain.
    • In little more than a century, fish stocks in the North Sea have declined by 99%.
    • For people living today, a grey and exhausted sea is all they know.
    • O.T. Olsen's Atlas of the North Sea's fish species is a reminder of the richness that once was.
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    Some shark species have evolved to walk

    The relatively quick evolution of nine unusual shark species has scientists intrigued.

    Image source: Mark Erdmann
    • Living off Australia and New Guinea are at least nine species of walking sharks.
    • Using fins as legs, they prowl coral reefs at low tide.
    • The sharks are small, don't be frightened.
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