21st Century Science and Technology Summer 2002

	Featured in the Summer 2002 Issue Vol. 15, No. 2

	FEATURES
	Leonardo da Vinci’s Geology and the Simultaneity of Time by Dino De Paoli On the occasion of Leonardo’s 550th anniversary, a look at some of the lesser known ideas of this universal genius: his revolutionary views of geology in a time when literal Biblical interpretations and Aristotelian materialism (such as “spontaneous generation”) prevailed. On a Connection Between Electromagnetism and Gravitation The Action of a Magnetic Field on the Motion of a Pendulum by Maurice Allais A glass pendulum oscillating inside a solenoid changes direction in response to changes in the direction of the electrical current. These experiments carried out in 1953 led the Nobel-Prize winning author to suspect a connection between electromagnetism and gravity. Space Farming on Mars Greenhouse Aboard MIR Shows Plants Can Thrive in Space by Dr. Tania Ivanova Astronauts living in space could be eating fresh vegetables and “space bread,” milled and harvested from an onboard greenhouse. The seeds from these plants will grow the first food crops on Mars.

NEWS

DEPARTMENTS

COMMENTARY
Schizophrenic-Like Video-Game Disorder
by Lyndon H. LaRouche, Jr.

IN MEMORIAM
THOR HEYERDAHL (1914-2002)
A 20th Century Pioneer of Ancient Navigation
by Rick Sanders

ASTRONOMY
100th Extrasolar Planet Candidate Found
by Marsha Freeman

NUCLEAR REPORT
An Open Letter for Support of UNSCEAR
by Zbigniew Jaworowski, M.D., Ph.D., D.Sc.

SPACE
SURREY’S NANO-SATELLITES
Bringing Developing Nations Into the Space Age
by Marsha Freeman

FUSION REPORT
PPPL CELEBRATES 50 YEARS OF FUSION RESEARCH
Putting Fusion Back on the Front Burner
by Charles B. Stevens

Practical Fusion Power Is a Question of Political Will
by Dr. Stephen O. Dean

EDITORIAL
Bring Back DDT, and Science with It!
by Marjorie Mazel Hecht

LETTERS

RESEARCH COMMUNICATIONS
A New View of Geodynamics
by Sieghart Moser

When Light Governs the Expression of Genes
by Emmanuel Grenier

NEWS BRIEFS

BOOKS
True Genius: The Life and Science of John Bardeen
by Lillian Hoddeson and Vicki Daitch
Reviewed by Laurence Hecht

Postscript: Have Hall’s Questions Been Answered?

Bones: Discovering the First Americans
by Elaine Dewar
Reviewed by David McVey

Eclipse: The Celestial Phenomenon That Changed the Course of History
by Duncan Steel
Reviewed by Richard Sanders