The controlled use of fire was an invention of the Early Stone Age (or Lower Paleolithic).
The earliest evidence for controlled use of fire is at the Lower Paleolithic site of Gesher
Benot Ya'aqov in Israel, where charred wood and seeds were recovered from a site dated 790,000 years ago.
It refers to the idea that cells are the basic unit of structure in every living thing. Development
of this theory during the mid 1600s was made possible by advances in microscopy.
The cell was first discovered by Robert Hooke in 1665. He examined
(under a coarse, compound microscope) very thin slices of cork and saw a multitude of
tiny pores that he remarked looked like the walled compartments of a honeycomb.
Because of this association, Hooke called them cells, the name they still bear.
In the fall of 1920 Dr. Frederick Banting had an idea that would unlock the
mystery of the dreaded diabetes disorder. Working at a University of Toronto
laboratory in the very hot summer of 1921 Fred Banting and Charles Best were able to
make a pancreatic extract which had anti diabetic characteristics. They were successful
in testing their extract on diabetic dogs.
Sir Alexander Fleming (6 August 1881 – 11 March 1955) was a Scottish biologist and pharmacologist.
Fleming published many articles on bacteriology, immunology and chemotherapy.
His best-known achievements are the discovery of the antibiotic substance penicillin.
The word is from the Latin virus referring to poison and other noxious substances,
first used in English in 1392 Virulent, from Latin virulentus (poisonous),
dates to 1400 A meaning of "agent that causes infectious disease" is first
recorded in 1728,before the discovery of viruses by Dmitry Ivanovsky in 1892.
The plural is viruses. The adjective “viral” dates to 1948.