Evolution

  • The 6th extinction

    John Phillips divided life into Paleozoic. Mesazoic and Cenozoic.
  • The 6th extinction

    Lancelot Hogben. Frogs lay eggs. African clawed frogs where ecported out of the Cape Town.
  • The 6th extinction

    Obstetricians keep tanks of frogs
  • Modern Darwins

    Francis Crick and James Watson discover "Every organism carries a chemical code for its own creation inside its cells, a text written in a language common to all life: The simple four-letter code of DNA
  • The 6th extinction

    Walter Alvarez. Earths polarity. Magnetic field. pinkish limestone in italy. Clay in limestone below the layer species of formainifera.
  • Modern Darwins

    Peter and Rosemary Grant, observations fo finchs in Galapagos. Evolve year to year.
  • Modern Darwins

    Drought, causes finchs beaks to become bigger, by passing down trait to offspring.
  • The 6th extinction

    Frog collecting trips to sierra navada. Berkeley.
  • The 6th extinction

    Narty Crump. Costa Rica. golden toads vanished. Forced to change projects
  • The 6th extinction

    Alvarezes said asteroid slammed into earth killing everything
  • The 6th extinction

    Karen Lips, established research site in El Valle. Study unclassified frogs. Only found dead frogs. Changed locations. Went to western Panama. Frogs healthy.
  • The 6th extinction

    Alvarezes crater astroid theory proved. killed dinosaurs
  • The 6th extinction

    Lips. Santa Fe. Western Panama. More dead frogs. Something was wipping them out.
  • The 6th extinction

    Frogs in El Cope disappeared.
  • The 6th extinction

    White snydrom in bats first photographed.
  • The 6th extinction

    Hicks. Bats start dieing .
  • Modern Darwins

    Hans Eiberg. said found genetic nutation for blue eyes. A to G on chromosome 15
  • The 6th extinction

    97% of bats are dead in middle of winter. Albany