Ask the Chatbot Games & Quizzes ProCon History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
Dan-Eric Nilsson
Directory
References
Discover
Mayer Amschel Rothschild (1744-1855), founder of the house of Rothschild; lithograph by Friedrich Lieder, c. 1830.
Where Do Anti-Semitic Conspiracy Theories About the Rothschild Family Come From?
Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg
Spies Like Us: 10 Famous Names in the Espionage Game
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
Thanksgiving Celebration Traditional Dinner Setting Food Concept
Why Is Thanksgiving in the U.S. Celebrated on a Thursday?
Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that
America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)
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”

Dan-Eric Nilsson

Swedish zoologist

Learn about this topic in these articles:

research in photoreception and eye development

  • details of the mammalian eye
    In photoreception: Refracting, reflecting, and parabolic optical mechanisms

    …genus Macropipus by Swedish zoologist Dan-Eric Nilsson, has optical elements that use a combination of a single lens and a parabolic mirror. The lens focuses an image near the top of the clear zone (similar to an apposition eye), but oblique rays are intercepted by a parabolic mirror surface that…

    Read More
  • details of the mammalian eye
    In photoreception: Evolution of eyes

    In 1994 Swedish zoologists Dan-Eric Nilsson and Susanne Pelger took up the challenge of “evolving” an eye of the fish type from a patch of photosensitive skin. Using pessimistic estimates of variation, heritability, and selection intensity, Nilsson and Pelger came to the conclusion that it would take 364,000 generations…

    Read More