Kenneth S. Deffeyes is a geologist who worked with M. King Hubbert, the creator of the Hubbert peak theory, at the Shell Oil Company research laboratory in Houston, Texas. Deffeyes holds a B.S. in petroleum geology from the Colorado School of Mines and a Ph.D. in geology from Princeton University, studying under F.B. van Houten. In 1967 he began teaching at Princeton, where he is now professor emeritus. He claims Chickasaw ancestry.

In John McPhee's 1981 book Basin and Range, about the origin of Basin and Range topography, Deffeyes teaches geology to McPhee and his readers by analyzing road cuts and the exposed geologic strata that resulted from the construction of Interstate highway 80.

He is the author of Hubbert's Peak, published in 2001. In 2005 he published the book Beyond Oil: The view from Hubbert's peak. On February 11, 2006 Deffeyes claimed that world oil production had peaked on December 16, 2005.

Avram Noam Chomsky (/ˈnoʊm ˈtʃɒmski/; born December 7, 1928) is an American linguist, philosopher,cognitive scientist, historian, and activist. He is an Institute Professor and Professor (Emeritus) in the Department of Linguistics & Philosophy at MIT, where he has worked for over 50 years. Chomsky has been described as the "father of modern linguistics" and a major figure of analytic philosophy. His work has influenced fields such as computer science, mathematics, and psychology.

Ideologically identifying with anarcho-syndicalism and libertarian socialism, Chomsky is known for his critiques of U.S. foreign policy and contemporary capitalism, and he has been described as a prominent cultural figure. His media criticism has included Manufacturing Consent: The Political Economy of the Mass Media (1988), co-written with Edward S. Herman, an analysis articulating the propaganda model theory for examining the media.

According to the Arts and Humanities Citation Index in 1992, Chomsky was cited as a source more often than any other living scholar from 1980 to 1992, and was the eighth most cited source overall. Chomsky is the author of over 100 books. He is credited as the creator or co-creator of the Chomsky hierarchy, the universal grammar theory, and the Chomsky–Schützenberger theorem.

Steven Chu (Chinese: 朱棣文; pinyin: Zhū Dìwén) is an American physicist and the 12th United States Secretary of Energy. Chu is known for his research at Bell Labs in cooling and trapping of atoms with laser light, which won him the Nobel Prize in Physics in 1997, along with his scientific colleagues Claude Cohen-Tannoudji and William Daniel Phillips. At the time of his appointment as Energy Secretary, he was a professor of physics and molecular and cellular biology at the University of California, Berkeley and the director of the Lawrence Berkeley National Laboratory, where his research was concerned primarily with the study of biological systems at the single molecule level. Previously, he had been a professor of physics at Stanford University. He is a vocal advocate for more research into renewable energy and nuclear power, arguing that a shift away from fossil fuels is essential to combating climate change. For example, he has conceived of a global "glucose economy", a form of a low-carbon economy, in which glucose from tropical plants is shipped around like oil is today.

Svante Pääbo (born 20 April 1955) is a Swedish biologist specializing in evolutionary genetics. He was born in 1955 in Stockholm to Sune Bergström, who shared the Nobel Prize in Physiology or Medicine with Bengt I. Samuelsson and John R. Vane in 1982, and his mother, Estonian Karin Pääbo.

He earned his PhD from Uppsala University in 1986. Since 1997, he has been director of the Department of Genetics at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany.

Pääbo's department in August 2002 published findings about the "language gene", FOXP2, which is lacking or damaged in some individuals with language disabilities.

Pääbo is known as one of the founders of paleogenetics, a discipline that uses the methods of genetics to study early humans and other ancient populations. In 2006, he announced a plan to reconstruct the entire genome of Neanderthals. In 2007, Pääbo was named one of TIME Magazine's 100 most influential people of the year.

In February 2009, at the Annual Meeting of the American Association for the Advancement of Science (AAAS), it was announced that the Max Planck Institute for Evolutionary Anthropology had completed the first draft version of the Neanderthal genome. Over 3 billion base pairs were sequenced in collaboration with the 454 Life Sciences Corporation. This project, led by Pääbo, will shed new light on the recent evolutionary history of modern humans.^{[citation needed]}

Will Steger (born August 27, 1944 in Richfield, Minnesota) is a prominent spokesperson for the understanding and preservation of the Arctic and has led some of the most significant feats in the field of dogsled expeditions; such as the first confirmed dogsled journey to the North Pole (without re-supply) in 1986, the 1,600-mile south-north traverse of Greenland - the longest unsupported dogsled expedition in history during 1988, the historic 3,471-mile International Trans-Antarctic Expedition - the first dogsled traverse of Antarctica (1989–90), and the International Arctic Project - the first and only dogsled traverse of the Arctic Ocean from Russia to Ellesmere Island in Canada during 1995.

Having been invited to testify before Congress on polar and environmental issues, Steger co-founded the Center for Global Environmental Education (CGEE) at Hamline University in 1991. During 1993 he founded the World School at the University of St. Thomas (Minnesota). In 2006, Will Steger established the Will Steger Foundation which is dedicated to creating programs that foster international leadership and cooperation through environmental education and policy.