Late 1700s: British farmers begin using selective breeding.

1798: Thomas Malthus argued human population always increases faster than food supply.

1809: Lamrack proposed that species change over time.

Early 1800s: George Cuvier produced fossil bone evidence, thinking it resulted from catastrophes.

1825-1835: Charles Lyell showed how rock and fossil evidence formed continuously.

1859: Darwin proposed natural selection.

1860: Wallace and Darwin thought natural selection would take a long time.

1900: Age of Earth estimates between 3 million and 2300 million years old.