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  • Nathaniel Kleitman, a professor of physiology at the University of Chicago, who along with his student at the time Eugene Aserinsky, is credited with the discovery of REM (Rapid Eye Movement) sleep.
    scf4399-139_Sleep 0006 Kleitman REM.jpg
  • Nathaniel Kleitman, a professor of physiology at the University of Chicago, who along with his student at the time Eugene Aserinsky, is credited with the discovery of REM (Rapid Eye Movement) sleep.
    Sleep 0006 Kleitman REM.jpg
  • Reconstruction of 90-million-year-old Carcharodontosaurus skull discovered by University of Chicago professor Paul Sereno on expedition to Niger in the Sahara.
    scf4327-049-carcharodontosaurus 0002.jpg
  • Reconstruction of 90-million-year-old Carcharodontosaurus skull discovered by University of Chicago professor Paul Sereno on expedition to Niger in the Sahara.
    scf4327-048-carcharodontosaurus 0001.jpg
  • Reconstruction of 90-million-year-old Carcharodontosaurus skull discovered by University of Chicago professor Paul Sereno on expedition to Niger in the Sahara.
    scf4327-048Carcharodontosaurus 0001.jpg
  • Reconstruction of 90-million-year-old Carcharodontosaurus skull discovered by University of Chicago professor Paul Sereno on expedition to Niger in the Sahara.
    Carcharodontosaurus 0001.jpg
  • 90-million-year-old Carcharodontosaurus tooth discovered during University of Chicago professor Paul Sereno's expedition to Niger in the Sahara.
    scf4327-051-carcharodontosaurus t 00...jpg
  • Reconstruction of 90-million-year-old Carcharodontosaurus skull discovered by University of Chicago professor Paul Sereno on expedition to Niger in the Sahara.
    Carcharodontosaurus 0002.jpg
  • 90-million-year-old Carcharodontosaurus tooth discovered during University of Chicago professor Paul Sereno's expedition to Niger in the Sahara.
    Carcharodontosaurus T 0001.jpg
  • 90-million-year-old Carcharodontosaurus tooth discovered during University of Chicago professor Paul Sereno's expedition to Niger in the Sahara.
    Carcharodon tooth 0001.jpg
  • 90-million-year-old Carcharodontosaurus tooth discovered during University of Chicago professor Paul Sereno's expedition to Niger in the Sahara.
    Carcharodon tooth 0002.jpg
  • Paul Sereno, associate professor of paleontology at the U. of Chicago with reconstructed Carcharodontosaurus skull of this 90 million-year-old meat-eating dinosaur he discovered in the Sahara in Niger, Africa
    scf4327-050-carcharodontosaurus 0003.jpg
  • Paul Sereno, associate professor of paleontology at the U. of Chicago with reconstructed Carcharodontosaurus skull of this 90 million-year-old meat-eating dinosaur he discovered in the Sahara in Niger, Africa
    Carcharodontosaurus 0003.jpg
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