Biology Timeline

5th - 4th century BC

100

Biology is born
Alcmaeon is the first scientist to make contributions to Biology and the first to practice dissection. In the course of his researches he makes the first scientific discoveries in the field of anatomy. Aristotle inaugurates scientific zoology. He is also a pioneer in attempting a system of classification. First one to hypothesize about evolution. In 300 BC Theophrastus first attempts to classify plants, as well as describing their structure, habits and uses..

2nd Century AD

200

Galen's dissection of apes and pigs give him the detailed information about the organs of the body. Galen is able to demonstrate that living arteries contain blood

Andrea Cesalpino

Sep 23, 1583

Cesalpino classifies plants according to their fruits and flowers

Zacgarias Janssen

Sep 23, 1590

Invents the 1st compound microscope

Gaspard Bauhin

Sep 23, 1623

extends Cesalpino's work in two books and devises method for classifying plants. The main significance of his work is that he is the first to arrange plants in separate groups, or genera. These two levels of classification eventually become standardized as the genus and the species

Robert Hooke

Jan 1, 1665

First scientist to describe Cells

John Ray

Sep 23, 1693

provides first sytematic classification of animals

Charles Darwin

Nov 24, 1859

Published his book on the the origin of species

Friedrich Miescher

Jan 1, 1869

First scientist to discover DNA

James Watson and Francis Crick

Apr 25, 1953

Proposed the structure of DNA. A double helix model