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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