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Astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, science communicator, author, and professor. Known for research on the possibility of extraterrestrial life, assembly of the Pioneer plaque and the Voyager Golden Record, and advocating for the greenhouse effect hypothesis on Venus.
Canadian psychologist, author, and media commentator known for his views on cultural and political issues. Often described as conservative and has identified as a classic British liberal and traditionalist.
"This book is the liveliest account of African history ever written, covering over [one] thousand years of trans-Saharan trade. "Finely written and researched. ... This edition will no doubt whet the appetites of a fresh generation of scholars and students for greater knowledge of parts of Africa still surprisingly little-known to the outside world." -- Journal of Islamic Studies "A unique source book." - The New York Times "Utterly enthralling ... splendidly romantic." -- The New Yorker
Israeli author, public intellectual, historian, and professor. Author of the popular science bestsellers Sapiens, Homo Deus, and 21 Lessons for the 21st Century. His writings explore various topics including free will, consciousness, intelligence, happiness, and suffering.
English computer scientist, essayist, entrepreneur, investor, and author. Known for his work on the programming language Lisp, co-founding Viaweb (later Yahoo! Store), and co-founding Y Combinator.
Entrepreneur and investor. Co-founder, chairman, and former CEO of AngelList. Notable early-stage investments in over 200 companies including Uber, FourSquare, Twitter, and Wish.com.